Ok so I'll start by saying I know my proposed set up is not an ideal situation but I hate returning fish I've owned for a while to the store so here it is, I added a royal pleco to my 180 with 3 juvenile green texas cichlids, 2 jacks, I oscar, and......a pretty tough CAE. the problem as you probably guessed is the CAE. everything is fine until the royal tries to go after some zucchini. I put 2 chunks in and the CAE vigorously protects both of them. I'm thinking of swapping some fish in my tanks. I would like to move my CAE to my 55 and move my young blue phantom pleco, red tailed shark, and maybe....wait for it.........my large mean gold angelfish to the 180. I know....angel fish with "real cichlids"...not a great idea. No fish are big enough to eat one another yet. Yet being the operative word. Obviously I'm concerned about the angel getting beat to death and the red tail and blue phantom getting swallowed at some point. I'll say though that my cichlids have been pretty docile thus far and my angel is about the size of my hand and he's pretty mean! This would leave my 55 planted tank pretty much empty with the CAE as the only bottom feeder. He would remain the only bottom feeder. Gonna be restocking that soon. I would leave the angel in with the CAE as he has never "kissed" another fish yet but that could change. Thoughts? Again I realize this is not the perfect situation. Thanks.