I have a 29 gallon and I'm wondering if I'm overstocked. I'm almost positive my tank is overstocked. I have some snails, 8 corydoras, 6 mollies, 1 platy, 4 guppies, and 2 upside down catfish. I would like to get 1 more upside down catfish but if I'm overstocked then I won't do that.