
Is 19 (mostly) fish too many for a 20 gallon tank?
I have 4 serpa tetra, 4 small guppies, 4 black skirt tetra, 2 Cory catfish, 3 snails and two miniature frogs in here. I do a 2 gallon water replacement twice a week and 5 gallons once a week. I'm planning on getting more Java ferns. The tanks had been going like this for 2ish months but I, 3 days ago, added the 2 frogs and the 4 black skirt tetras and I'm worried it might be too much in there now. I haven't noticed anything to cause concern but I'd rather ask now before it becomes a problem. I'm considering taking the 4 serpaes out as they are the only ones I see being nippy.