so its getting hotter and i didnt have the same tanks last summer. i noticed that my 20g was at 84F today and started at 79F. kinda of a big swing. my room seems kinda hot, no air conditioning running but it is usually hot upstairs. i have 2 t5 HO lights on it so thats probably why. i will probably put a air condition unit on a window to stop this but i dont want to yet. any one got any suggestions how to keep tanks cooler??? dont want to take top off, have a azoo fan on my 40g but its so annoying dont know if i can handle two.