I know how big they get but am putting him in a 800gal pond and plan on upgrading to a 1,000gal pond later onsbuse;4129480; said:you sold them though...there mouths are not neerly as big... if you intend on keeping this fish(witch if you don't GL on selling as you may have to try to give it to someone) you should look to my listing of tankmates and mgk's and my suggestions...