In the 90's I had a Trigger tank, 6" Queen, 6" Clown, 4" Niger, Huma, Pink Tail, and the Dreaded Undulated. Everyone played nice except the undulated and he was very small. The big issue was water changes, hair algae, and Nitrates (80). If I did it again I would have a lot of Xenia, GSP, Frogspawn, phosban reactor, and a super large fuge with a bunch of chaeto to control phosphates and nitrates. Also starting with juvies would be recommended.