How to maintain tank temperature in the summer?

[Leozumi]

Hey everyone.
So I've got 3 aquariums (240l, 120l, 60l) in an apartment with no air conditioning. I keep 2 of the tanks at around 24-25C and the other at 29-30C. Now that summer has finally arrived and outside temperatures have risen, I'm wondering how I can keep two of my tanks cooler. I've already turned the heaters off, but beyond that is there anything else I can do?

Thanks!

 

[lapin]

If it is not real humid you can use fans blowing across the water. Evaporative cooling works.

 

[flyline]

What I have done in the past is get gallon water containers and freeze them and put them in the sump and swap them out as needed. It’s worked for me along with fans blowing across the top of the tank and it’s cheep and easy.

 

[APX90]

i live in southern california where it is frequently 90F +, a fan only works to an extent for my tank and the only way i was able to see stability was with a chiller. if your tanks are close to each other you may be able to plumb each into each other for a chiller