So, I have been preparing an octo-tank and for months and feel I'm ready to put one in. The species I want is O.Briareus and I'm on a waiting list for one. Here are my specs. I have a 72 gallon bowfront that is completely sealed. I am currently running a Fluval 305 canister filter, powerhead, air pump and heater that keeps a pretty consistent 79d. I have a aqua c urchin that I will be running when the octopus gets here. My water quality seems to be very good aside from all my tests that check great. I've been using tap water as my source for now, I've been considering buying a water distiller. Fortunately Cincinnati has one of the best water filtration systems in the country (so I'm told) and everything in there is doing great. Here is whats in there. I have a condy anemone, rock anemone, 2 ricordeas, 2 harlequin stars, a brittle star, nudibranch, a turbo, and a flame scallop. As I hear, some of these tankmates aren't suitable. Any advice as what else is suitable or on anything else? Pretty sure I can do some trades on these guys with my LFS. Thanks!