Stores are not going to carry $4 fish that all need to be separate, if they have to run filtered tanks for them all. They would end up costing them money.
I suspect that if the conditions were as bad as some people claim, there wouldn't be so many success stories of people buying them and keeping them for any length of time.
I suspect that if the conditions were as bad as some people claim, there wouldn't be so many success stories of people buying them and keeping them for any length of time.