What Do I Do During a Power Outage with My Reef Tank?

Power outages are stressful for reef keepers, but with the right preparation and quick action, your tank can survive even extended outages. Here's what to do:

Immediate Actions (First Hour)

• Keep the lid closed - Retain heat and prevent fish from jumping
• Don't feed - Uneaten food will foul water without filtration
• Wrap the tank - Use blankets or towels for insulation in cold weather
• Turn off equipment - Prevent power surge damage when electricity returns

Oxygenation is Critical

The biggest threat during outages isn't temperature - it's oxygen depletion. Without flow, oxygen levels drop rapidly:

• Battery-powered air pump - Your #1 emergency tool. Get one now if you don't have it
• Manual agitation - Use a cup to scoop and pour water every 30 minutes
• Remove the lid - Only if your fish won't jump; increases gas exchange

Temperature Management

Most reef tanks can handle temperature swings of 5-8°F for short periods:

• Cold weather: Insulate with blankets, seal foam boards over glass
• Hot weather: Float ice packs (sealed!) in the sump
• Monitor: Track temperature with your thermometer

When Power Returns

1. Turn equipment on gradually - heater first, then pumps
2. Check all livestock for stress signs
3. Do a small water change if outage lasted 4+ hours
4. Monitor parameters for the next 24-48 hours

Be Prepared: Emergency Kit

Every reef keeper should have:

• Battery-powered air pump with spare batteries
• Battery backup or UPS for return pump
• Insulating materials (blankets, foam)
• Generator (for serious reefers)

Track your tank's recovery with the ReefBay app parameter logging to ensure everything returns to normal after an outage.