[untamed]

I'm thinking about the Prism Pro....that is a hang on skimmer. You need some sort of plan that would allow the skimmer to flow into the top of the tank without the top of the tank having any opening at all. Maybe a fine mesh top that the skimmer flows through? Sounds like a salty mess in the making, however.

No answer from me...but you'll have to think that part through. Obviously, the top of the tank needs to be completely sealed. My understanding is that the octopus will squeeze through any opening smaller than it's beak. They are also strong for their size, so the top will have to be heavier than you expect so he just can't push it up/off.

I doubt you will find this a very interesting pet. It will probably hide virtually all the time. Small octopus are also not reputed to live very long...although I don't know the specifics of the blue-ring. Please share your tank build and experience (good or bad) so that others on the board can learn from your experience.