Heres an intresting story for ya! When my dad was a kid he lived on catalina. And back then (they might still do it now) the toilets were full of saltwater! So he and his brothers Uncle Steve, and Uncle Stewart (RIP ) cought a small giant pacific octo, and brought it home and put it in a tank less than 75 gallons (I think) for quite a while. They did this by taking saltwater from the toilets and puting it in the tank every now and then. How convinient! :P But one night it crawled out of the tank and into their moms bed (RIP also ) And well they had to let it go! lol :P .