Newbie. Have been handed a community pool in mechanical and chemical disarray, and I'm trying to recover the situation while keeping the pool open.
When I stepped into the crisis, FC was ~ 0.5ppm. Turns out the trichlor feeder lid was jammed so nobody put any in. Fixed the lid and threw in some sticks. This is where things stand:
50,000gal in-ground plaster. Sand filter.
Equipment ancient and undersized, turnover estimate = 12 hr.
Bucket tests show leaking ~1,000-2,000 gallons per day.
Miraculously, water is currently clear.
pH < 7.0, i.e., off scale low
Now that there is at least some chlorine in the pool, I'm taking the next step, which I understand is to bring TA back into range. And that begs the question: do I simply try to bring up TA with Baking Soda? If so, I hear that I'd do well to bring it up 10 ppm per day for 5 days. OR do I use Soda Ash to simultaneously attempt to recover pH? If so, how do I calculate Soda Ash affect on TA? All resources I find indicate only how to calculcate its impact on pH.
This is an albatross, but on the other hand it's an interesting test of technique. Beyond the Baking Soda / Soda Ash question, I'm all ears if anybody has any other advice!
Have benefitted from many threads on this forum! Thanks!!