Written by Tony Burton, The Frogfather | Licensed UK amphibian keeper, breeder and bioactive vivarium specialist | Last reviewed: 14 August 2026.

Quick answer: Most short power cuts are not immediate dart frog emergencies. Keep the vivarium closed, monitor the room temperature and avoid making several dramatic changes at once. Temperature—especially overheating—is normally the first priority. Lighting and automated misting can usually be interrupted briefly without harming healthy adult frogs.

The time to decide what you will do during a power cut, failed thermostat or broken misting pump is before it happens.

At The Frogfather, emergency and contingency planning forms part of operating a licensed animal collection. With multiple vivariums and more than 100 frogs at different life stages, a small equipment failure can affect many animals if it is not noticed and contained quickly.

This guide brings that planning into one practical system for home keepers. It covers power cuts, heating and cooling failures, broken misting equipment, water loss, failed feeder cultures, evacuation and the emergency supplies worth keeping ready.

Contents

1. The emergency priorities
2. What to do in the first ten minutes
3. Dart frogs during a power cut
4. Response by outage duration
5. Power cuts in cold weather
6. Power cuts during hot weather
7. Heating and thermostat failures
8. Misting-system failures
9. Lighting and UVB failures
10. Ventilation and fan failures
11. Water-supply problems
12. Feeder-culture failures
13. Backup power and electrical safety
14. Dart frog emergency kit
15. Emergency records and contacts
16. When evacuation is necessary
17. When power or equipment returns
18. Warning signs requiring urgent action
19. Emergency response table
20. Frequently asked questions
21. Printable emergency checklist

The emergency priorities

In most dart frog emergencies, use the following order:

1. Human safety. Do not enter a burning, flooded, electrically unsafe or structurally dangerous building to reach the frogs.
2. Temperature. Check the room and vivariums for dangerous heat or cold.
3. Secure containment. Make sure doors, tubs and temporary containers remain closed and escape-proof.
4. Water and hydration. Maintain suitable moisture without flooding or suddenly soaking cold animals.
5. Air exchange. Avoid sealed, stagnant and overheating temporary containers.
6. Observation. Identify any frog already showing weakness, poor coordination or abnormal breathing.
7. Food. Healthy adults can normally tolerate a brief missed feed more safely than they can tolerate overheating or an unstable rescue attempt.

Do not prioritise keeping the display lights on while the room is overheating. Do not flood the vivarium because an automatic misting cycle was missed. Deal with the largest welfare risk first.

What to do in the first ten minutes

1. Confirm whether the problem affects one item, one vivarium or the entire property.
2. Check the room temperature using a battery-powered thermometer.
3. Look for water leaks, overheating equipment, burning smells or electrical damage.
4. Switch off or unplug visibly faulty equipment when it is safe to do so.
5. Keep vivarium doors closed unless there is an immediate reason to intervene.
6. Record the time the failure began.
7. Check weather conditions and the expected indoor-temperature trend.
8. During a power cut in England, Scotland or Wales, report it by calling 105.

Calling 105 is free and connects you to the appropriate electricity-network operator, regardless of which company supplies your electricity.

Do not repeatedly open every vivarium to see whether the frogs are all right. Opening the doors releases retained heat and humidity and introduces another opportunity for escape.

What happens to a dart frog vivarium during a power cut?

A power cut may stop:

• plant lighting;
• UVB lighting;
• room heating or enclosure heating;
• air conditioning and cooling fans;
• automatic misting;
• foggers and water pumps;
• Wi-Fi monitors and alarms;
• refrigerators used for temperature-sensitive supplies; and
• communications or internet access.

These systems do not all have equal urgency.

A temporary interruption to lighting is normally far less serious than a room climbing towards a dangerous temperature. A missed misting cycle is normally less dangerous than flooding an enclosure with cold water in response.

What changes first?

The room temperature normally changes more slowly than the electricity supply. A planted glass vivarium also retains heat and humidity for a period after equipment stops.

The actual rate of change depends on:

• the weather outside;
• the insulation of the building;
• the size of the room;
• the number and size of the vivariums;
• whether heating or cooling was operating beforehand;
• ventilation; and
• whether doors and windows are opened.

Measure the conditions in your actual room. Do not assume that another keeper’s outage timeline will apply to your property.

Power-cut response by duration

Approximate duration	Likely priority	Practical response
Under one hour	Observation	Keep enclosures closed, check temperature and confirm the outage
One to four hours	Temperature trend	Monitor the room, preserve stable conditions and prepare backup equipment if necessary
Four to twelve hours	Season and room conditions	Begin controlled heating, cooling or manual misting only where measurements show it is needed
Twelve to twenty-four hours	Longer-term stability	Review food, water, backup power, temporary housing and alternative locations
More than twenty-four hours	Contingency relocation	Consider moving animals or critical equipment to a safe pre-arranged location

These times are planning prompts, not biological deadlines. A two-hour summer outage in a room already at 29°C may be more dangerous than a twelve-hour spring outage in a stable 22°C room.

Power cuts in cold weather

During a winter outage, the first objective is to slow heat loss from the room.

• Close internal doors.
• Close curtains or blinds after daylight fades.
• Stop unnecessary opening of vivariums.
• Move portable enclosures away from external walls and draughts where this can be done safely.
• Insulate the outside of enclosures with blankets or boards without sealing essential ventilation.
• Concentrate temporary enclosures in the warmest safe room if relocation becomes necessary.

Warm the room before individual vivariums

Where possible, maintaining one room is safer and more controllable than placing improvised heat sources against multiple glass tanks.

Do not place:

• boiling water bottles against glass;
• chemical hand warmers inside vivariums;
• unregulated heat mats directly beneath frogs;
• hot stones or heated objects where animals can contact them; or
• combustion heaters in an unventilated room.

If warm-water bottles or heat packs are used around an insulated transport box, separate them physically from the animals and monitor the temperature continuously. The aim is gentle stability, not rapid heating.

Read the Cold UK House Vivarium Guide for normal winter preparation.

Power cuts during hot weather

A summer power cut can be more urgent because it may stop air conditioning, extraction and cooling fans while the building continues absorbing heat.

Reduce heat entering the room

• Close curtains or reflective blinds on sun-facing windows.
• Keep vivariums out of direct sunlight.
• Switch off non-essential battery-backed equipment that produces heat.
• Open or close windows according to whether the outside air is cooler than the room.
• Move portable enclosures to a cooler downstairs or north-facing room where safe.
• Use battery or USB fans to circulate room air indirectly.

A fan does not actively cool air below room temperature. It moves air and may increase evaporation. Avoid directing strong airflow straight at frogs or repeatedly drying the vivarium.

Using cool packs or cold water

Never put ice directly into a dart frog enclosure or against an animal.

Cold packs or chilled bottles may be placed outside an enclosure or within a purpose-designed cooling system, provided:

• the frogs cannot contact them;
• condensation cannot enter electrical equipment;
• the temperature is measured continuously; and
• the enclosure is cooled gradually.

Do not create a rapid temperature shock while trying to correct overheating.

For detailed summer management, use the UK Summer Cooling Guide and the Dart Frog Heat-Stress Guide.

Heating and thermostat failures

Not every heating failure is a loss of heat. A failed thermostat can leave a heater permanently on, which may be more dangerous.

If the enclosure becomes too cold

1. Confirm the reading with a second thermometer.
2. Check whether the problem affects the heater, thermostat, socket or room.
3. Move the animals only if the room will continue becoming unsafe.
4. Introduce regulated warmth gradually.
5. Monitor the frogs and the temperature during recovery.

If the enclosure becomes too hot

1. Disconnect the suspected heater if it is safe to do so.
2. Move the heat source away from the enclosure.
3. Increase safe room ventilation.
4. Move the enclosure or animals away from the heat source if necessary.
5. Cool gradually while maintaining suitable hydration.

A second independent high-temperature alarm can reveal a thermostat failure before the frogs show visible distress.

Misting-system failures

A failed misting system is usually manageable when detected promptly.

If the pump stops

• Check the power supply, timer and reservoir.
• Inspect tubing for kinks or air locks.
• Check whether nozzles are blocked.
• Hand-mist using a clean dedicated sprayer while repairs are arranged.

Do not automatically replace every missed automated cycle with a prolonged manual soaking. Inspect the leaf litter, plants, glass and substrate first.

If the system remains permanently on

• Disconnect the pump.
• Check for flooding and overflowing drainage.
• Remove accumulated water.
• Improve safe airflow if surfaces remain saturated.
• Inspect plants and electrical equipment for water damage.

If a pipe becomes disconnected

Protect human safety first. Water and mains electricity are a dangerous combination. Isolate the electrical supply when safe before handling wet plugs, extension leads or equipment.

Keep a clean manual sprayer available even if the vivarium uses a premium automated system.

Lighting and UVB failures

A brief lighting failure is normally low priority. Healthy frogs and established plants are unlikely to be harmed by one darker day.

If lighting fails:

• do not place the vivarium in direct sunlight;
• do not compensate with an excessively long or bright cycle afterwards;
• replace the failed equipment safely;
• restore the normal timetable; and
• check whether the failed lamp or power supply produced excess heat.

Loss of UVB for a short period does not justify adding an extra dose of vitamin D3. Continue the established supplementation routine.

Ventilation and fan failures

Most dart frog vivariums use passive ventilation and will not immediately become unsafe if a supplementary fan stops.

Fan failure matters more where:

• the fan is part of the room’s heat-control system;
• the enclosure is unusually sealed;
• lighting produces significant heat;
• a water feature depends on powered circulation; or
• condensation and stagnant air develop rapidly.

Monitor temperature and the rate at which surfaces dry. If needed, improve room airflow indirectly rather than pointing a powerful fan directly into the enclosure.

Water-supply problems

A domestic water outage does not normally create an immediate emergency if prepared misting water is already stored.

Keep clearly labelled reserves of:

• RO water for misting;
• prepared tadpole water where applicable;
• drinking-quality water for people and other animals; and
• clean water for essential washing.

Do not confuse raw RO water with prepared tadpole water. Label the contents and date clearly.

If stored water develops an abnormal smell, visible contamination or an uncertain history, do not use it merely because an emergency has occurred.

Fruit-fly and feeder-culture failures

A feeding emergency often develops more slowly than a temperature emergency, but it is one of the most common preventable failures in a large collection.

Maintain redundancy

• Keep cultures at several different ages.
• Do not store every culture in exactly the same location.
• Start replacements before the oldest cultures collapse.
• Maintain more than one suitable feeder species where practical.
• Keep productive springtail cultures outside the display vivariums.
• Know another local keeper or supplier who may be able to help.

If food becomes temporarily limited, prioritise:

1. newly metamorphosed froglets;
2. small juveniles;
3. underweight or recovering frogs;
4. actively breeding animals; and
5. healthy established adults.

Do not flood vivariums with excessive feeders as soon as supplies return. Restore the normal routine and observe body condition.

Backup power and electrical safety

Different backup systems suit different equipment.

Backup option	Useful for	Limitations
USB power bank	Phones, small fans, USB thermometers and some monitors	Not suitable for mains heaters or air conditioning
Uninterruptible power supply	Routers, alarms, controllers and some low-powered pumps	High-wattage equipment can exhaust it quickly
Portable power station	Selected equipment during longer outages	Runtime depends on battery capacity and actual wattage
Generator	Longer property-level outages	Requires strict outdoor operation, fuel management and professional electrical safety

Calculate backup runtime using the equipment’s real power consumption. A battery that runs a small monitor for a day may run a heater for only a short period.

Never operate a petrol or diesel generator inside a home, garage, animal room or other enclosed space. Do not connect a generator directly to household wiring unless an appropriate system has been installed by a competent professional.

Prioritise the backup load

During an outage, power:

1. monitoring and alarms;
2. essential room heating or cooling where feasible;
3. critical pumps or ventilation;
4. communications; and then
5. non-essential lighting.

Keeping decorative lighting running is rarely the best use of limited battery capacity.

Dart frog emergency kit

Keep the emergency kit together and somewhere accessible in the dark.

Monitoring and communication

• battery-powered thermometer with minimum and maximum readings;
• spare batteries;
• charged power banks;
• battery or wind-up torch;
• printed emergency contacts;
• paper and waterproof pen;
• phone-charging cables; and
• battery radio where appropriate.

Environmental control

• clean manual misting bottle;
• labelled reserve of suitable water;
• USB or battery-powered fan;
• insulating boards or blankets;
• cool packs and heat packs for external emergency use;
• spare thermometer;
• spare thermostat;
• spare misting nozzle, tubing and connectors; and
• basic hand tools.

Temporary housing and transport

• secure ventilated tubs in several sizes;
• individual labelled transport pots;
• insulated animal-transport boxes;
• paper towel and clean leaf litter;
• frog-safe door or vent seals;
• labels showing species, locality and individual identity; and
• a carrier large enough to move the containers safely.

Collection support

• backup fruit-fly cultures;
• productive springtail cultures;
• fresh supplement;
• appropriate cleaning equipment;
• disposable gloves;
• first-aid supplies for people; and
• contact details for an amphibian-experienced veterinary practice.

Do not assemble an improvised “frog medicine kit” containing old antibiotics or copied treatment doses. Emergency preparation should help stabilise and transport an animal—not encourage undiagnosed treatment.

Emergency records and contacts

Keep both digital and printed copies of:

• species and locality held in each enclosure;
• number of animals;
• individual identification where possible;
• normal temperature ranges;
• equipment and power requirements;
• feeding and supplement routine;
• tadpole-water preparation;
• veterinary contact information;
• an alternative keeper or emergency location;
• electricity network and utility contacts;
• insurance information where applicable; and
• instructions for anybody who may care for the collection in your absence.

Save 105 in your phone and write it on the printed plan. The UK Government also recommends keeping important emergency numbers on paper in case phones cannot be charged or internet access is unavailable.

Use alarms that fail visibly

A Wi-Fi alarm is useful, but it may stop communicating during the same power cut you need it to report. Where possible, use layered monitoring:

• local audible alarms;
• battery-powered displays;
• Wi-Fi notifications;
• minimum and maximum temperature records; and
• somebody able to attend if you are away.

When should dart frogs be evacuated?

Moving frogs creates stress and escape risk. Do not evacuate them simply because the lights have gone off.

Relocation becomes more reasonable when:

• the building is affected by fire, flood, smoke or chemical contamination;
• safe temperature cannot be maintained;
• the outage is expected to continue and a safer prepared location exists;
• the animal room cannot be entered safely;
• critical equipment cannot be restored; or
• the property itself must be evacuated.

Temporary transport procedure

1. Prepare and label individual secure containers before catching frogs.
2. Use damp—not flooded—paper towel or suitable clean leaf material.
3. Provide ventilation appropriate to the journey and temperature.
4. Place the containers inside an insulated outer box.
5. Keep hot or cold packs separated from the animals.
6. Monitor the box temperature.
7. Keep species, localities and individuals separate.
8. Move animals directly to the prepared destination.

Never leave amphibians unattended in a parked vehicle. Vehicle temperatures can change rapidly even when outdoor conditions appear mild.

When power or equipment returns

Restoration can create a second problem if every device restarts simultaneously or a timer attempts to repeat missed cycles.

1. Confirm that the electricity supply appears stable.
2. Inspect wet electrical equipment before reconnecting it.
3. Check thermostats and heaters before leaving them unattended.
4. Check the misting timer and disable any unintended immediate cycle.
5. Restore temperature gradually.
6. Return lighting to its normal timetable rather than extending the day.
7. Check drainage before running the misting system.
8. Observe each frog.
9. Record the duration, minimum and maximum temperatures and actions taken.

Do not compensate for a missed feed, missed misting cycle or dark day by doubling everything afterwards.

Review the incident

After the collection is stable, record:

• what failed;
• how the failure was detected;
• how long it lasted;
• which equipment or supplies were useful;
• what was missing;
• whether any frog was affected; and
• what will be changed before the next incident.

A contingency plan improves when it is tested against real events.

Warning signs requiring urgent action

Seek urgent veterinary advice when a frog shows:

• loss of coordination;
• collapse or inability to right itself;
• open-mouth breathing;
• persistent abnormal posture;
• severe weakness;
• marked dehydration;
• unresponsiveness;
• burns or suspected electrical injury;
• exposure to smoke or chemicals; or
• continued deterioration after conditions are stabilised.

Do not assume that every abnormality following an outage was caused solely by temperature. The incident may reveal an existing health problem.

Use the Dart Frog Health Guide for the wider warning-sign and veterinary process.

Emergency response table

Failure	Immediate action	Do not
Short power cut	Keep enclosures closed and monitor temperature	Start moving every frog immediately
Room becoming cold	Reduce heat loss and prepare controlled backup warmth	Apply unregulated intense heat
Room overheating	Reduce heat input and cool the room gradually	Put ice directly into the vivarium
Misting pump stopped	Check the system and hand-mist as required	Replace every missed cycle with prolonged soaking
Misting stuck on	Disconnect it, inspect drainage and remove excess water	Leave the substrate flooded
Heating stuck on	Disconnect safely and monitor cooling	Cool the frogs abruptly
Lighting failed	Restore the normal schedule when repaired	Compensate with an extended bright day
Feeder cultures crashed	Prioritise vulnerable animals and obtain replacement feeders	Overfeed the remaining insects in one sitting
Water leak near electricity	Protect people and isolate the supply when safe	Handle wet mains equipment while energised
Building unsafe	Follow emergency-service instructions	Re-enter a dangerous property for animals

Frequently asked questions

How long can dart frogs cope without electricity?

There is no single safe duration. What matters is how quickly the room temperature and enclosure conditions change. A short outage in mild weather may require little intervention, while a brief outage during extreme heat could become urgent.

Will dart frogs be harmed if their lights go off for a day?

A single darker day is unlikely to harm healthy frogs or established plants. Restore the normal schedule when power returns rather than extending the following light period.

How long can a dart frog vivarium go without misting?

This depends on ventilation, substrate, planting, room temperature and the enclosure’s existing moisture. A mature planted enclosure may retain suitable humidity for many hours. Inspect actual conditions and hand-mist only as needed.

Should I open the vivarium during a power cut?

Usually not. Keeping the doors closed helps retain stable temperature and humidity. Open it only when intervention, inspection or transfer is genuinely necessary.

Should I feed dart frogs during a power cut?

Temperature and stability come first. Healthy adult frogs can usually miss a brief feed. Continue feeding if conditions remain safe, but do not release large quantities of feeders into an enclosure that may need to be moved.

Can I use a heat pack during a winter outage?

Heat packs can be used outside a transport container or within an insulated outer box, but they must be separated from the frogs and monitored. Never place a chemical heat pack loose inside the vivarium.

Can I put ice in a dart frog vivarium during a heatwave?

No. Direct ice contact and sudden temperature changes can harm the frogs. Use controlled external cooling and monitor the temperature continuously.

Will a UPS run my vivarium equipment?

It depends on the UPS capacity and the equipment’s wattage. Low-powered monitors, routers and pumps may run for useful periods, while heaters and air-conditioning equipment can exhaust batteries quickly.

What number do I call for a UK power cut?

Call 105 in England, Scotland or Wales. The free service connects you to the relevant electricity-network operator regardless of your energy supplier.

Should I move all my frogs to small tubs during an outage?

Not automatically. Moving them creates stress and escape risk. Relocate animals when their current environment cannot remain safe or the building itself must be evacuated.

What is the most important backup item?

A dependable battery-powered thermometer is one of the most useful items because it tells you whether action is actually required. A manual sprayer, charged phone, torch, suitable water and secure temporary containers are also fundamental.

How often should I test the emergency plan?

Check supplies, batteries, backup power and contact details at least every few months and before forecast extreme weather. Test equipment without compromising the frogs’ normal systems.

Printable dart frog emergency checklist

• Save and write down the UK power-cut number: 105.
• Keep a battery-powered thermometer ready.
• Charge power banks and backup power regularly.
• Keep a clean manual misting bottle.
• Store clearly labelled suitable water.
• Maintain spare feeder cultures at different stages.
• Keep secure temporary containers and insulated boxes.
• Keep cooling packs and heat packs physically separated from animals.
• Maintain a spare thermostat and basic misting-system parts.
• Print the collection list and normal husbandry requirements.
• Record veterinary and emergency contacts.
• Arrange a trusted backup keeper or safe temporary location.
• Check smoke alarms and electrical equipment.
• Sign up for weather and power-supply alerts where appropriate.
• Review the plan before forecast heatwaves, storms or cold weather.

Emergency planning is not about expecting the worst. It is about removing panic from the first few minutes when something ordinary—a failed plug, blocked nozzle or local power cut—happens at the worst possible time.

A stable room, accurate measurement, simple backup equipment and a written plan will protect more frogs than a cupboard full of untested emergency gadgets.

Continue with the Dart Frog Temperature Guide, Misting System Guide or Complete Dart Frog Care Guide UK.

Frequently asked questions about dart frog emergencies

How long can dart frogs cope without electricity?

There is no single safe duration. What matters is how quickly the room temperature and enclosure conditions change. A short outage in mild weather may require little intervention, while a brief outage during extreme heat could become urgent.

Will dart frogs be harmed if their lights go off for a day?

A single darker day is unlikely to harm healthy frogs or established plants. Restore the normal lighting schedule when power returns rather than extending the following light period.

How long can a dart frog vivarium go without misting?

This depends on ventilation, substrate, planting, room temperature and the enclosure’s existing moisture. A mature planted enclosure may retain suitable humidity for many hours. Inspect the actual conditions and hand-mist only when needed.

Should I open the vivarium during a power cut?

Usually not. Keeping the doors closed helps retain stable temperature and humidity. Open the vivarium only when inspection, intervention or transfer is genuinely necessary.

Should I feed dart frogs during a power cut?

Temperature and environmental stability come first. Healthy adult frogs can normally miss a brief feed. Continue feeding if conditions remain safe, but avoid releasing large quantities of feeders into an enclosure that may need to be moved.

Can I use a heat pack during a winter power cut?

A heat pack can be used outside a transport container or within an insulated outer box, but it must remain physically separated from the frogs and the temperature must be monitored. Never place a chemical heat pack loose inside the vivarium.

Can I put ice in a dart frog vivarium during a heatwave?

No. Direct contact with ice and sudden temperature changes can harm dart frogs. Use controlled external cooling and monitor the temperature continuously.

Will a UPS run my vivarium equipment?

It depends on the capacity of the UPS and the wattage of the connected equipment. Low-powered monitors, routers and pumps may run for useful periods, while heaters and air-conditioning equipment can exhaust batteries quickly.

What number should I call for a UK power cut?

Call 105 in England, Scotland or Wales. This free service connects you to the appropriate electricity-network operator regardless of which company supplies your electricity.

Should I move all my frogs into small tubs during an outage?

Not automatically. Moving frogs creates stress and escape risk. Relocate them when their existing environment cannot remain safe, essential conditions cannot be restored or the building itself must be evacuated.

What is the most important item in a dart frog emergency kit?

A dependable battery-powered thermometer is one of the most useful items because it shows whether intervention is actually required. A manual sprayer, charged phone, torch, suitable water and secure temporary containers are also fundamental.

What should I do if my misting system stops working?

Check the power supply, timer, reservoir, tubing and nozzles. Hand-mist with a clean dedicated sprayer while repairs are arranged. Do not replace every missed automated cycle with prolonged manual soaking.

What should I do if the misting system becomes stuck on?

Disconnect the pump, inspect the drainage reservoir and remove accumulated water. Check plants, electrical equipment and substrate for flooding, then correct the timer, relay or pump fault before reconnecting the system.

What should I do if a vivarium heater becomes stuck on?

Disconnect the suspected heater when it is safe to do so, move the heat source away from the enclosure and monitor the temperature with a second thermometer. Cool the enclosure gradually rather than exposing the frogs to extreme cold.

Can dart frogs cope with a missed feed?

Healthy established adults can normally tolerate a brief missed feed more safely than they can tolerate overheating or an unstable emergency intervention. Newly metamorphosed froglets, small juveniles and underweight frogs should be prioritised if feeder supplies become limited.

When should dart frogs be evacuated?

Evacuation becomes appropriate when the building is affected by fire, flood, smoke or chemical contamination, when a safe temperature cannot be maintained, or when the property itself must be evacuated. Do not move frogs simply because the lights have gone off.

What should I do when the electricity comes back on?

Check that the supply is stable, inspect any wet electrical equipment and confirm that heaters, thermostats and misting timers are operating correctly. Restore temperature and lighting gradually and check that the misting system does not repeat missed cycles.

How often should I test my dart frog emergency plan?

Check batteries, backup power, stored water, emergency contacts and temporary containers at least every few months and before forecast heatwaves, storms or cold weather. Test backup equipment without disrupting the frogs’ normal systems.