Hi.any help and advice is greatly appreciated. I have an empty 30 gallon that I've been cycling...for about 2 weeks. With plants but not fish. I have catfish from a smaller tank that i want to put into my 30 gallon...and make it just an all catfish tank. I currently have 3 dwarf..2 otos...3 pepper corys...2 juli corys..and 2 emerald corys. Is that too many for a 30 gallon? It's a tall tank btw. Thanks. Also..should i add any more? As I've heard they like to be schooled? And how many should i add at a time? I heard 3 or 4 at a time is best.