Mods, sorry, looked for an appropriate subforum to put this in but could not decide where it should go as it is not really about heaters. Please move to where you see appropriate and thank you. So, where I live, the weather went from say 40's last week to where yesterday it was 81 degrees here. My tanks yesterday read 81, today they read 83 and change, Bettas, but think that is a bit too high, unless treating ick. I lowered them a bit, but they are on lower than 80 (the arrow thingy on the heaters), so not sure where the heat is coming from. But, at what point do heaters get shut off? It is so hot here these past 2 days, it is sickening. In dead of summer, I run AC 2/47, so maybe leave them in?