Many of us have been to a Walmart that keeps fish in horrible conditions.  They are kept in small tanks with fish that they shouldn't be with.  Dead fish sit in the tanks for days, possibly weeks.  Many of the fish that are still alive are very sick or injured.  The bettas are kept in small dirty containers stacked on top of each other without water changes or enough food.  The tanks can have fish with fin rot, ich, and dropsy.  No one wants to buy fish like these and fish are dying in large numbers, help keep Walmart from mistreating these fish.  They should be taken care of correctly or otherwise not sold at all.

http://www.consumeraffairs.com/pets/walmart.html