Osvaldo M Posted March 8, 2020 Report Share Posted March 8, 2020 Hello everyone! I have a 20'x48" round index pool and the problem is that the pH is above 6.8. I tried changing my phenol red drops, and adding baking soda (more than 1lbs per day) but don't doing anything. The water looks great, but I need to know how to increase the pH. Thanks Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted March 8, 2020 Report Share Posted March 8, 2020 What is your alkalinity? Quote Link to comment Share on other sites More sharing options...
Osvaldo M Posted March 9, 2020 Author Report Share Posted March 9, 2020 450ppm, I don't know how to decrease it. I used Muriatic Acid to lowering but didn't works. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted March 9, 2020 Report Share Posted March 9, 2020 450ppm? Are you sure? What are you using to test this? What is your chlorine level? Quote Link to comment Share on other sites More sharing options...
Osvaldo M Posted March 9, 2020 Author Report Share Posted March 9, 2020 Im using a TDS-3 meter. Right now is in 511ppm. My chlorine level is .5-1. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted March 9, 2020 Report Share Posted March 9, 2020 I am not a fan of digital meters. Just an old guy doing it old school. Have you checked your meter against another source? Get a water test done at the pool store? Buy some test strips or a taylor kit? Is there anything else I should know? Is it a saltwater pool? If your meter is right, and your alkalinity is that high, add 6 gallons of muriatic acid, all at once, with pump running. Test again in 24 hours. Once your alkalinity is down near 100, we can address your ph. You are certain that is not a calcium hardness reading? Quote Link to comment Share on other sites More sharing options...
Osvaldo M Posted March 9, 2020 Author Report Share Posted March 9, 2020 Ok, I will try with test strips and let you know. Itsn't a saltwatee pool. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted March 9, 2020 Report Share Posted March 9, 2020 TDS is total dissolved solids, not alkalinity. Use a strip, make sure you follow the directions on the bottle. Tell me all of the readings you get. Quote Link to comment Share on other sites More sharing options...
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