Ever since my highschool Marine Science class, I've wanted to keep an octopus. I've been looking at this site for a few months now, and I've immersed myself in books and articles. As the time grows near, I would like to ask the pros for some help. Here is what I have: 75 gallon tank wet/dry filter rated for 125 gal. fine substrate lots of hiding spaces made out of stone I did not have the money for LR, or else I would have bought that. I just used some from the company Feller Stone. There are probably many things that I have forgot to list, though. I know a protein skimmer is needed, and I was wondering on what type you guys prefer. Also, is there anything, other than sea stars and sea cucumbers that an octopus won't eat? Thanks.