I think I know the answer to this question, but I'm going to throw it out here anyway.
I've got a 15 gallon tank with a aquaclear 20 gallon filter. I've got 13 fish in there already (6 x pristilla tetra's, 1 x male betta, 2 x black mollies, and 4 x peppered cory catfish).
According to the aq...
So I'll just start by saying that I've done some things incorrectly in setting up my tank and I've realized that in doing a bit more research after the fact.
So, with that out of the way, here's my story
My wife went to Petco and bought a betta for my 4 year old so that he could learn about...