Found this site trying to find out how to beat black algae and I think now that I have switched to the BBB method 2 weeks ago, major progress has been made. So big thanks for that! Before switching I was using the HTH Dual Action 3" Tablets in an automatic chlorinator. No matter how hard I tried, I couldn't keep the pool looking nice. After running some tests with the 6 way test kit I grabbed at walmart, I found I had almost no CYA in the pool. So thats were my question lies. I have been using those tablets for the two years I have owned the house, and only bought them as thats what the PO recommended. I would have thought from what I read here the CYA would have been through the roof. So my question is "Where did all the CYA go?"
Thanks again for all the help again,