hi I've had my 105L fish tank for three weeks now. I am new at this so I need advice on what steps to take next. I have 5 platys (one of which I think is pregnant but I can't see her gravid spot she is just really fat) and 2 bronze corys (about 7cm long) and 3 medium sized catfish don't know what kind it looks like a bristle nose but its not exactly the same skin color. I also have some Eichhornia crassipes. Anyway how am I doing in terms of space? What fish should I add or get more of (I thought more corys)? Is 3 too much catfish? I have noticed that they like to bite of the stems of my plants. Any type of advice is appreciated! Thanks!