my friend owns a LFS and we have a great system setup...he has a 180g "big" fish tank setup in house and I have my 170g tank at home when he has too many fish I get to keep some in my tank until he sells what hes got and can house the ones I have and I let him use some of mine for show at the same time...right now i have a 12" CK, a 14" ID shark of his plus my 1 oscar , venny pike and rtcxtsn..he has my tsn plus 2 pacu, a 10" ID shark, 16" spotted gar..next week who knows what we'll have...its a nice thing we have going cause I was constantly trading in fish and changing stock and of course that costs money but now I rotate stock for free plus I get a free bag of massivore for helping him out.