I have been interested in owning an Octopus for a very long time. I have been an avid saltwater enthusiast for 15 years. I have been reading up on all the information I can get a hold of regarding these creatures. The tank that I am planning on using is a 40 long. I know that is on the small end for these animals, however is it possible. I will have plenty of filtration, a mechanical filter, uv sterilization, etc. Are there things that I need to be concerned about. Any and all information is welcome, the more the better. Thank you for your time.