I'm very new at this. I have noticed that a few local pool stores are on to the BBB method. They made negative remarks about it. They told me, you have to take care of your pool and test your water often. We have a few people that come in to our store that acually put baking soda and 20 mule team in their pool! He said thats crazy! Those people have nothing but trouble with their water. I guess its alot like the antique buissnes. When antique road show came on the seen, it taught people what to look for. So the antique dealers no longer had the upper hand.