Wal-Mart is the worst about fish!! Many things i've seen wrong with they're ways of "care"
First off they had 8 spotted puffer fish in their small aquariums, looks like maybe 5-6 gallon aquarium? Most of them if not all had practically no fins at all.. poor puffers.. Algae growing all up the walls on most tanks, and some just had filthy filthy water!! Nobody even tends to them, I felt bad for some of the glo fish and waited for a while to buy some but nobody ever came to my attention!! they were nibbling on a dead fish.. I told one lady that the puffers were in completly horrible housing and she said they'll sell soon, its okay. I was astonished to say the least but what should i expect.. My local petco is awesome with their fish. Petsmart is decent, there is one lady who is very knowledgable and cares about all the fish. some of the others arent so great.. I'll end my rant here..