I notice in the Pool School that there are recommendation levels for vinyl, plaster, and fiberglass. I have an all tile pool with little 1" tiles comprising the entire surface of the pool, so there is a lot of grout. I'm assuming that I should use the recommendations for plaster. However, the local pool shop guy recommended raising TA up to 140 for this type of pool. It sounds high to me, but he's the pro and I don't think he was just trying to sell chemicals. I thought I would bounce this off the forum before I raised the TA. I would also like to know what my target CYA should be for this type of pool.
The pool is in Phoenix, AZ, and here are my latest test results from yesterday:
TA: 72 (although my reagent drop test shows 90)
I know the chlorine is low--that has been addressed. The pool has a lot of acid and chlorine demand. I add a pint of MA every three days or so. The water looks perfect--not cloudy in any way.
Thanks for your advice!