For those of you who have experience with these particular fish. I have a texas 5", Mayan 3", and Rd 4.5". The Rd is in a 55g alone and the other 2 in a 90g. Some one wants to sell me a 150g for a very good price. Do you guys think they could coexist in this tank? I had the Rd in the 90g once before but he was a little too aggressive for the other guys. I'm wondering since this will be a new tank with no established territory will it work and will they get too big for all 3 to live in the same tank. Gonna get the tank either way, 250$ for the tank, hood, and stand I feel is very good.