Well i found a pair of red devils at the lfs with fry and i was wondering if they would live in a 75gal or if that is too small for the pair. they both have real good color, male is about 6-7" long, female 5-6" long, and the fry look to be recently free swimming. really like them but don't know if the two would live long term in my 75. right now they are in a 20 gallon and look like they would really like my 75 