Hi, I've kept a reef aquarium before, it wasn't very advanced, it had frogspawn, xenia, duncans, and zoas (not sure if I spelled those right?). What got me interested in keeping saltwater aquariums was when I saw an octpus in an aquarium at the zoo, it was the coolest thing ever. So I kept a 45 gallon reef tank with clowns, the coral listed, and at one point long nosed hawkfish, I've been thinking about keeping my money until I have enough to buy all of the best/good supplies so I don't have to take it down because of a failing system. I read articles on this site about Bimacs, they seem like a good first time octopus? My old aquarium didn't have the best supplies either, so I never had a sump, is that a requirement of keeping octopus? Even if it isn't I'd still want to get it, it sounds like it helps a lot. Can anyone inform me? Or even share what your set ups are?