It gets really hot where I live right now. Like 39 degrees(celsius) a few days ago. House temp is also very hot, 26C. With the heater turned off, my tank still sits at about 26-27C. Yesterday I got some new rcs. I heard that they can live in up to 30C, but I want to get it to about 23-24 since that is the comfort temperature for everything in the tank. Could this be possible without a cooler?