I'm pretty new to pool ownership - we just had ours put in in early August. The company that sold me the pool set me up with a lot of products - Dazzle "Pure and Simple" is the line...it's kind of confusing. Everything is prominently branded Dazzle and "Pure + Simple" but there's not a lot of info as to what's in the containers. Even the pool company got confused because I had a UV light and that meant I should be using some different flavour of Dazzle. Anyway...to make a long story a little less long...
The last test I had done at the pool store (Aug 23):
73800 L / 19500 Gal In-Ground, Vinyl lined
pH: 7.6 (Target 7.4-7.6)
CYA: 80 (Target 30-50)
Adj TA: 114 (Target 125-150)
Ca: 232 (Target 175-225)
They recommended I add 3.5 Kg of Dazzle TA+
Up until last week I was chlorinating with Dazzle Tri-chlor sticks.
I came back from a short trip to Minneapolis with a TF-100 test kit. My wife's aunt was supposed to throw a couple of sticks in the skimmer while we were away, but she didn't and we got a couple of inches of rain, and things were pretty murky when I got back. Reading 0 Chlorine in the pool. I hadn't opened the TF-100 yet, but threw in a couple of bags of the Dazzle weekly shock/oxidizer (not chlorine, but it doesn't really say what it is - safe to swim after 15 minutes apparently). It was Labour Day so I couldn't buy any bleach so just added 3 sticks to the skimmer - which didn't do anything for the chlorine levels in the pool.
I got out the TF-100 and ran the numbers through the pool calc last Tuesday, bought a bunch of bleach and got the pool up to shock level quickly by adding 20 L of 4% bleach. Everything cleared up quickly and looks great, but my TA seems really high. Here are my numbers as of Friday night (Sept 9).
So everything looks good except TA and CH seem too high. I've run the CYA test twice over a couple of days last week and I'm pretty sure it's right between 40 and 50 using the black dot test.
Do I need to do something about the high TA? I've got a waterfall and waterslide, so I could lower pH with acid and bring it back up with aeration, but is it necessary? We're getting down to the end of the season here...probably winterizing before the end of the month...any ideas?