Cooling with Ice
- Fill plastic soda bottles with water and freeze them. When needed they can be placed in the sump or floated in the aquarium.
- Double or triple bag cubed or chunks of ice in plastic bags (ZipLocks work great). Place these bags in the sump or tank as needed. After the ice has melted, place the bags back in your freezer and freeze again.
Adjust Tank LightingYour tank lights can create a lot of heat as well as light. Metal halides produce the greatest amount of heat, followed by daylight Power Compacts, then Actinic PC's, then fluorescents.
To reduce the amount of heat created by your tank lights, you can cut back on the number of hours per day that your highest heat generating lights are on. For a day or two (or even longer), even your corals will do fine with just your actinic or fluorescent lights running. You can also cut back on the total number of hours you give your corals light.
- Keep hinged glass covers open.
- Raise up or remove solid hoods or canopies all together until things get back to normal. If you do this it's wise to temporarily place some egg crate material on top of the tank to prevent fish from jumping out. This type of material can be found at any lighting and home improvement store.
- Install cooling fans in the hood or canopy.
- Place small (4" - 6") clip-on fans on the top of your tank (or sump). Aim them across the surface of the water.
Commercial or DIY Chiller
You can Compare Prices on Aquarium Chillers.
Make an emergency DIY chiller. To do this you'll need:
- Ice Chest
- Submersible Water Pump
- Plastic Tubing (about 20')
Coil the tubing up and place it inside the ice chest, leaving enough on the ends to hook one end up to the pump in your sump or tank, and the other end to flow water back into your tank or sump.
Fill the ice chest with ice. Pumping the water from your tank or sump through the coiled tubing in the ice and then back into your tank or sump. With this method you will see a gradual change in the tank water temperature, just keep an eye on your thermometer and turn the pump off or on when needed to make adjustments.