I've had a Cb endli in a 90 from about when it was 4". It went to 12 " In a yr without tankmates. Once it got to 12" I felt bad for it and myself being a medical student have a lot of studying to do so I gave it to a friend who has a single bb aro in a 7*2.5*2 tank. He now lives there. Just the aro and the endli.Yes, polys do poop a lot, I also have a 180 with a 11” Delhezi and a 13” endi, along with a 5” kelberi, two 6” snooks and a CL and a pim blochi. I do 50% weekly on that and all is good, but I’m selling one of the snooks and the CL is there temporarily to deal with a snail problem. I’ll probably get something bigger at some point