mr_z
New member
There is an open chamber towards the back where overflow is. The protein skimmer adds enough oxygen and top is not air tight. I had considered drilling holes in the top but we are doing fine without them. When I say sealed, I mean closed off so the octopus cannot squeeze out through openings.
ahhhh ok i thought it was sealed completely looks cool tho i can just imagine an octopus trying to get out of there and if it did get out what would it do.