I am still new to the pool stuff and am a little unsure about what to do. I have been having some problems with high TA and now my PH has risen also. I bought the muriatic acid, but wanted to check here before I do something I shouldn't . I have a 20,000 gallon vinyl pool. I just tested my pool here are my numbers. Please let me know what you think I should do. I know I need to add some bleach to bring it up to 4.6.