Dealer tanks are not designed for long term health of the fish. They are for keeping the fish until they sell--sort of like the cages they keep dogs in at pet stores. Not a realistic long term home. What you can get away with in the short term, and what is in the long term, best interests of the fish are completely different. IF you choose to cram too many fish into your own tanks, that's your call. Advising others to do the same--and pulling up threads that are MONTHS old, is not really great. Thanks.