man, once at walmart, something bad happened to all the tanks. None had any water flow. about 90% of the fish were already dead (think overstocked commet tanks, and cichlids and all others they sell there), and no one even cared. I called a manager over, took tons of pictures, and asked him if it was a normal thing to have this many dead fish in the tanks. He called someone over, and had them start pulling the dead fish out, but they continued to sell them, not even waiting to find out what was wrong. Sad.