Anyone else have problems with bubbles in the tank with an octopus or is it just me? We are down to one octo now as the smaller one was cruious and played in the current created by a bubble wall that was in the tank for him. I didn't think anything of it until I came in one night and saw he fighting to stay submerged because of a well of air that had been captured in his mantle. Not knowing what to do I gently manipulated him with the net until the bubbles seemed to be gone, but it was too late and the little guy died a couple days later. The other octo is doing fine but did seem a little depressed after the death of his tankmate.