Cool. Thanks from the info. The sand would be from near a reef, not the beach so I dont know if that makes a difference. I thought it would be nice catching my own octo, but I know theres going to be age and species issues. And I had no clue about the lacerock! If I knew that, it would have never seen the inside of my cichlid tank!
As far as the tank goes, Im having a custom tank built by a local company called Ocea. The back will be drilled near the top for the intake of my filter and near the opposite bottom for the exhaust with a one way valve to prevent flooding my sump in the event of a power outage. The bulkheads will be flush mounted so in the event that the octo tries to pry, he will have a much harder time trying. I have seen some that only stick out a few inches, but I believ that would give him enough leverage to crack the glass. The top will be glass with velcro keeping it in place. The lighting will probably be a dual florescent setup with a white and actinic bulb. Now the filtration has been the big stump for me. Trying to get a good filter and protien skimmer, without giving that much leway for him to bypass any openings. Which is why I opted for an overflowless tank with a wet dry. The tank is a bit more expensive, but well worth it for an animal as inteligent and unique as a octo. The stand and canopy will be made by myself and my father out of oak using a light colored stain and gloss black for accent, all covered with a laqure clear.
Now heres where I need help again. I was going to use the classic sump with a PS in the reservior, but wanted the PS first. I found one for a decent price. Its an aquaclear pro 150. It handles up to 600 gph and up to a 150 gallon tank, doubling the "required" filtration needed for the tank and the some. Have any of you had expierience with this filter? Is the PS first a good idea for a octo. I figured it would be as if the little guy inked, very little ink would get to the rest of the filter, leaving a much less demanding job for the carbon. Every one Ive talked to said they prefer to just have the skimmer in the sump. Would that be more ideal? Please, Any input on ANY of this will be greatly appreciated, as I want the best expierience for me and my future (other) eight legged friend.(my current one, a cobalt blue tarantula, is a "little" ornery and not quite personable. Cant wait to get a goliath birdeater!).
One last thing. Would a UV sterilzer be beneficial to an octo tank? I have heared conflicting views on this, so, once again, any input is more than welcome!
Id never say "My octo tank is escape proof!"..........I think its called the Titanic effect. 
Whatever, it wont be as bad as a bite from a cobalt!
THAT GUYS NUTS! Those things are know to bite for NO reason what so ever! Cool pic though. Ever seen a really hairy spiecies.......almost cute looking!
