How can I cool down my aquarium without a chiller?
You can use a desk or window fan to cool the aquarium. Just run the fan over the water. Always use the lowest setting to avoid blowing water out of the aquarium.
Can a fan cool down a fish tank?
A fan mounted at an angle or completely horizontal blowing on the water surface can decrease the temperature of the aquarium significantly. Keep in mind that if a lot of water evaporates from the aquarium, the salinity of the water will increase.
Is 82 degrees too hot for tropical fish?
You don’t want the temp bouncing around more than 3 degrees because that will stress the fish. Try running your heater at 81-82. If you are truly concerned, run a small fan by the sump to help out, but also expect more evaporation.