I am interested in keeping an octo. I have a 55 gal tank and a seaclone protein skimmer. I am going to get a canister filter and a hang on filter. I will be using Southdown play sand as a substrate. I just wanted to know what other things are needed in keeping an octo bimac. Filter suggestions, tankmates, ways of aquascaping. Any info needed in keeping one healthy and happy is appreciated.