How would I go about doing this? It used to be home to my mantis which passed away last week and I was thinking of trying a dwarf octo sold on TBS. How would I go about making sure the octopus won't escape? Are the teeth where the water flows to the back compartments too big and if so, what should I do to make sure it can't get through. Thanks for any help. I still might get another mantis, but I've always wanted to try a ceph. My original plans was to make my now reef an octo tank once my 225 was set up, but unfortunately I won't be able to afford the extra tank once the big tank goes up.