I just finished cycling another 75 gallon and in it I have 2 demosoni and 3 yellow labs. I want mostly a peacock tank with this 75. Can I put 2 Aulonocara Stuartgranti (red shoulder) and 1 Aulonocara sp "Maleri Island" ? Local petland has them on hold for me they have them in the "Mixed mbuna tank" and there 3 for 18.99...lol....I want to take advantage of this deal IF this set-up will work. Demo's and labs are about 1 and a half inches maybe. BTW the reason I have the demosoni's and yellow labs in there is because They were getting beat up in my other tank. I would say they are not too aggressive...they barely even come out unless its to eat. ::EDIT:: I can try to put the demosoni's and labs back in my other 75 but I dont want them to get killed :-(. I have Kenyi that are a menace!!