Hello all, Approaching my first summer with my planted tank in full swing. I live in an old house without central air and the interior temperature can reach the mid 80s on hot days. How do I keep my fish (mostly Tetras and Corys) cool? I’ve tossed some ice cubes in every now and then but they definitely get agitated and aggressive when the temp spikes over 82F. I usually keep it around 77F. Thanks in advance!