I have a chiller to cool the tank and a fan to cool the chiller and an AC unit to cool the room the tank is in
Without all these the chiller goes through fuses like a kid with candy. Its ridiculous but due to the room its in and the lack of any air flow its very difficult to keep the room cool (even with a ceiling fan). Last year before we moved the AC into the room my tank hit over 90F and I lost several colonies and frags. Since moving the AC into the same room things are better and hopefully I won't have to go through that again. Cracks me up that I have AC but don't get to enjoy it in the rest of the house. Everything for the tank
Speaking of which, I need to stock up on those fuses, one blew the other day and it wasn't even that hot out