yip thats what i mean. i wantto keep them in my tank all year round. aeration isnt a problem as i keep koi.light isnat a problem as i have u.v lights.but information from books theirs very little and most people have said the same as you,but some people who i have talked to when fishing in the winter have stated they keep the crabs themselves but have never told me how to do it.i dont know if its bull or not but time will tell.
cheers mark