Hello. I have only been in the saltwater hobby for about 3 months. I have succesfully built a 4 gallon finnex (includes fish, crustaceans, and 3 different corals). I am getting a 29 gallon biocube in a week, and I want to know how I can modify it for a octopus. How do I keep it out of the outlfow? Also, can I use thin plastic mesh (for sewing pictures onto) to create good barriers for the overflows?(Shouldn't limit waterflow) I am thinking about just putting this thin mesh in between the tank and hood and weighing it down.. Enough? Lastly, I need to know the best possible octopus to get. I want the longest living species I can fit in a biocube 29... Any suggestions?