Hi Everyone. I have an inground 16x32 pool. It's has 17,500 gallons of water. It's four years old. I had been using Baquacil for three years.
This year I decided to go to chlorine. It took 20 gallons of clorox added all at once, then 10+6 bags of cal hypo. It finally killed all the Baquacil. Now the problem is, my ph is low, the akalinity is kind of high, I have 4.6 and 4.8 combined chlorine levels but I don't register any free chlorine.
My next step was to shock again which I did. It didn't help anything but increase the combined chlorine levels and drop the ph. Then I was told to add 2 lbs of ph, 2 hours later add a bucket of cyanuric acid. Keep the filter going all night then measure the ph. I did, it was low. That night add 4 lbs of cal hypo.
Well I did everything but the shock because it rained like crazy and I figured it would just wipe everything out. My ph is still low and I still do not have any free chlorine registering. I live in PA. We've had a cold May so far. The water temp is around 68 to 70 degrees. I have a de filter. Any suggestions on what to do?
[Edit: jjparrish: To include paragraph breaks]