Thanks!!! In the 30g I have 2 JD and 1 Pictus Cat. 75g nothing as of yet but I want an Oscar. I have 3 fish i moving from my 55g which are Gold severum, Red Texas Cichlid and a Blue or green Texas cichlid. Any suggestions on anything else that would be nice in there with the four like a catfish. I heard rainbows but i really no nothing about them. thanks for the pointers.