Hey there. New to the site but it has help me gobs. I have a 20 X40 inground (vliner) with a 10.5 ft deepend. This my 3rd summer with pool and thought I had the hang of it but maybe not. I am having a serious problem with TA. Posted something under brown water cause, I had that too but have since remedied that. Desparately seeking to lower TA. Help!!!