Hi all - I hope you guys can help me to understand the following:
Nothing wrong with my pool, aside when I check pH and TA, they seem to be way too low.
I'm using a HDX testkit and it shows a very bright yellow, way below 6.8. Raising it with sodium carbonate did not work at all. No change, even after using twice the required amount. The pH does not bounce, it is stable.
So I had a look at TA. After adding the chemicals to the testkit, I get a bright yellow, so I assumed this means no alkalinity, as that's the final color during the TA test. I tried to raise it using sodium bicarbonate. But after adding 5 pounds on one weekend and 7 on the next - still the same result. I switched the pump off for 4-5 hours after adding it.
I verified my test results with a different brand test kit from a colleague.
I am using Max Blue tablets for chlorination. They come with a water softener and stabilizer.