I just have to add when I was at walmart last, I always like to visit the bettas they have, and see what colors are available and basically just give the little ones some attention.
I was so disappointed at the aquarium section there. the bettas were in close to no water, and many of them were dead. Which im sure is traumatizing to the ones around. many seemed to be sluggish and only moving upon me nudging the container. a few were covered in a cotton like growth and overall just suffering. I asked to speak to an associate of that area because It hurt me so bad to see these beautiful little creatures suffering. The man basically claimed they had a protozoan parasite and he had been treating some. I mean really though its your job to take care of the fish and there were over 5 dead on the shelf. I will say I was assured he would no longer be purchasing them because of the manufacturer not being cleanly, and the sadness of it. He himself apparently had already rescued a few.
so sad, I hope all wal marts aren't like this!:(