I am owner of a small swimming school in southern Mexico. As you might imagine my pool's bather load is heavy during the most of the season. I really had serious problems with very high CYA and low Ph levels last year, which derived in poor water quality, high expenses on chemicals, unscheduled pool shutdowns and patron's discomfort. This season I decided to use liquid chlorine at 13% as main sanitizer agent, after replacing the full 17,000 gallons of water for a fresh start. I had serious concerns about putting aside trichlor pucks, floculants, clarifiers, algae treatment and stuff alike; but right now I am more than happy with the results: my water is cleaner than ever.
My current levels are:
CC: 0.5 or less (once or twice a week I get a reading of .6 or little a bit higher; having non-existent CYA makes my pool prone to have unwanted higher levels)
CYA:0 (I know this is far from your recommendations, but Mexican standards for facilities open to the public require this level for Indoor pools.)
CH: 100 (I've been trying to get calcium chloride to raise this, but it is not easy get that in a small town for an affordable price. I am still working on it)
Every sunday I pour 2 liters of Muriatic Acid to set the Ph level between 7.2 and 7.6; but during the week, it will consistently rise up until it gets to 7.9 by saturday. I am worried that this behavior may affect the temperature exchange device in the heat pump at some point. Do you think my hardware is in jeopardy?
Thanks in advance for you comments.
P.S. I am currently using FAS-DPD test kit (from TF guys) for FC & CC twice a day to have my levels well monitored.