Hello all, relatively new to your forum. I am getting rid of my 180 gallon reef in favour of a tank devoted to what got me into the hobby in the first place, that being an octopus. However, the escape proofing of the tank concerns me. I understand the weighted, secured lid, no problem. What have all of you done concerning drilled tanks with overflows? Utilizing a sump is a must for me as I have a large protein skimmer, but how do you prevent an octopus from getting over the overflow. Likewise, an external pump will be used with loc line entries into the tank. What would stop an octopus from crawling into the outlet in the event the water flow stopped and there was no water coming out of the nozzle? One more question. Commonly reef aquariums do not use filter pads or sponges before the water reaches the protein skimmer as the skimmer removes many particulates. I understand though that filters are required in a tank that houses an octopus to protect intakes etc. How do you handle the shed skin and debris that collect and fowl the filter. Do you change them daily? Thanks for your help with these specifics its greatly appreciated.