I'm getting ready to switch from test strips and big name chemicals to TFPC Method over the next few days/couple of weeks. I have received my K-2006 test kit. My Speed Stir and Sample Sizer are in transit. After receiving the K-2006 and before I tested with it, I dipped a test strip to see where it was reading CYA because I knew if it was too high I might have to drain anyway. Why waste chemicals, right? Test strip showed to be between 50 and 100 but leaning closer to 100 in color. So my first test with my K-2006 was CYA. Test strips were close... K-2006 result was dead on 100. Anyway, I couldn't stand it any longer and just had to do a complete test last night. (And I wanted to make sure I did the CYA test right. It was still 100.)
Here are my test results.
pH 7.4 (aeration over night raised to 7.6)
Now according to pool math, my free chlorine is already well above the recommended level for a pool with 100 CYA.
My questions are...
1. I know it would be best to drain 60 or 70%, but why can't I let my FC drop and maintain it from 8 to 13 ppm for 100 ppm CYA for this season? (Instead of lowering the pool to drop CYA and investing another $50 in fresh water.)
2. Use acid to lower my pH and TA, and aerate to bring my pH back up?
3. What do I do for the CC? Will it drop as FC drops?