Sorry if i posted this late. Last year i had a 75gl tank with 32fs. I had 6neon tetras,13guppies,4mollies and sword tails[that did not bother the tetras],3glowlight and 2striped fish maybe zebra danoi.We asked someone to take care of the fish while i was gone. The dude forget to turn the heater for 3ds. And when i came back in 4ds every thing was stinky. Directly the next day i bot 30 or so fishes. 
dont have your heater on for long
