Dave Nicholls

I have been running my hot tub the same way for several years and have never had an issue. I use Bromine pucks, bromine shock and then 2 other chemicals. I have attached the pictures of the chemicals and the problems with the water and you can see how the filter looks. I thought maybe it was some kind of mold so I dumped the water cleaned and filled. It happened again so this time I ran a chemical called Spa Renu which is supposed to clean all the plumbing etc, I then dumped the tub again thoroughly cleaned everything and refilled with fresh water. It looked good until I put in the Pure Spa back in, the filter shows what it looks like. Could this just be bad chemical? I can't think of anything else that it could be. Any help would be appreciated. Thanks Dave