Just wanted to report in. I chose to raise the clorine level to 35 ppm for 60 hours with pump running. I brushed each day. It has been two days since I stopped brushing and it still looks good. If I dont need to brush tomorrow I will know that I have won the battle. I am going to add Borax to the pool next week to see if I can level off the acid usage and provide some algecide benefits as well. I hope it works! Thanks for help.