No current issues with pool; water looks good, etc.
15k Gunite Pool DE Filter
Current filter PSI: 15
Location: Dallas, TX
Test Kit: Taylor Kit distributed by Leslie's. Purchased at Leslie's Pool Supply. I don't know the Taylor kit # but it's the standard kit with the rectangular dual test tubes with a FC range of 0-5.
I recently changed to Bleach (June 7 '14) and discontinued Trichlor 3" tablets in Chlorinator.
I rarely use Cal Hypo to shock. Pool seems to be going well with a FC level maintained between 7-12 (recommended range according to the Pool School online calculator with my current CYA level)
Current readings (test every other day in summer season)
FC: 5+ initial reading
pH: 7.2 initial reading. Added Muriatic Acid 2 days ago to lower TA. Expect pH to increase next test. It's been climbing recently. Pool is aerated some due to the Jet Return positions.
CYA: 90 the last time I checked on June 18 (2014). I'm waiting for a while to see if evaporation, discontinued Trichlor use, and water top-offs will lower CYA before draining some water.
CH: 350 but haven't checked it since April (2014). My city water here has, I believe, a higher than normal CH content out of the faucet (~90).
Average water temp in afternoon: 84-88°F
Latest CSI: -.21
Does this also happen when measuring FC? For example, I tested my pool today and the initial reading was 5+ (over the range of my Taylor kit). A few minutes later, the reading appeared to be about 2.0
Same thing with the pH: Initial reading: 7.2 Delayed reading: 7.5