I am checking out preformed ponds (so I can take it when I move) and the largest I can find is 270 gallons. This seems like an acceptable size for a temporary pond until I buy my dream home
. But the distributer (MacCourt) suggests you only keep 6 3" fish in this size pond. Why? Are stocking levels so different in ponds? Can those same 6 fish grow to there full 12" in this size pond?