Agree with the above. Use baking soda to get TA to around 60-70. Don't forget that you have to make a correction to TA as a function of CYA. Test kit tells you the ratio. Then feed it acid every day to target 7.6-7.8 PH. My 32,500 gallon plaster/gunnite pool drank 28-32 ounces of Muriatic...