Hello Fishlore, I am having some problems concerning my aquarium temperature. I have a 55 gallon aquarium at a private school that I recently enrolled in, and have been taking care of it since September 2016. Back then the temperature would stay where I wanted it at 73-75F but now since it's July and it is also Summer I am unable to get the tank under 80F. The building itself has no insulation, very poor air conditioning and is in a very warm area of California. It may not help that very few people are there in the Summer so the air conditioning isn't on so the building gets very hot. This is not a problem with my heater, it is never on at all. My main question being is should I be concerned? Stocking of the tank is as follows 10 Nerite Snails 7 Platies 15 Neon Tetras 9 Panda Corydoras 2 Bolivian Rams 1 Bristlenose Pleco Are these fish going to suffer for the next month and some with the major heat? Should I invest in an Aquarium Chiller?