High TA, CH but pool looks great


LifeTime Supporter
Feb 25, 2008
Los Gatos, CA
Pool Size
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Update--The RO was done last Monday. He actually overshot a little, bringing my TA and CH quite low. I pushed them both up plus added some liquid chlorine right away. After a few days balancing, and adding CYA and salt as well. I've posted my log after the filtering and the most recent log today for comparison. I also discovered in this process that there was something wrong with my TFP Test Kits refills this year (both were reading high), so I had to get Taylor reagents for CH and TA. Now jives with others' test of my water. Pretty happy!

Test Results 06-15-2021 @ 04:24 PM
Free Chlorine: 3.5
Combined Chlorine: 0.0
pH: 7.8
Total Alkalinity: 90
Calcium Hardness: 230
CYA: 50
Salt: 4050
Temperature: 84°F
CSI: -0.09

Test Results 06-08-2021 @ 11:49 AM
Free Chlorine: 0.1
Combined Chlorine: 0.2
pH: 7.6
Total Alkalinity: 38
Calcium Hardness: 150
CYA: 5
Salt: 1340
Temperature: 76°F
CSI: -0.68
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