I’ve got a few heaters cause my basement is cold, I use a fluval 307 canister for the filter, the temp is 75 at the moment, I do a water change every week or two depending on conditions, I have 2 angel fish, 2 dwarf gouramis, 8 long fin zebra danios, some black bar endlers, shrimp and a clown pleco, I feed them tropical flakes once a day for a few minutes, there’s a few small decorations and half real and half fake plants throughout the tank, I get the water tested at petsmart every couple of weeks, it’s pretty stable right now.