List critical loads
Air pumps, heaters and water movement usually matter more than decorative lighting during an outage.
Prepare backups
Battery air pumps, charged power stations, insulated covers and spare airline can buy time. Use every device according to its safety instructions.
Reduce oxygen demand
Pause feeding during a prolonged outage and avoid unnecessary handling. Gently agitate water when safe if aeration is lost.
Protect temperature gradually
Insulate tanks and warm the room rather than adding hot water directly. Avoid rapid swings.
Plan for leaks and heater failure
Keep buckets, towels, spare heaters, a thermometer and a safe temporary container available. Electrical water hazards require adult professional help.