Cyanuric Acid Too High According to my Store App But...


Jun 9, 2020
Basking Ridge, New Jersey
Pool is Crystal Clear -- and I want to Keep it that way! :)

Please take a look and let me know what you guys think I need to do -- if anything.

The app I am using -- naturally --- tells me to "go into the store for more info"
Using Store App to Log Results. I am not sure if it's ok to mention the store by name -- so I will not.
Test Kit is AquaCheck 7

Here are the readings - They are my best estimate based on comparing the color:

Free Chlorine: 5
Total Chlorine: 10
pH: 6.6
Total Alkalinity: 140
Total Hardness: 250
Cyanuric Acid: 85
Total Bromine: 20


Gold Supporter
TFP Guide
Jul 21, 2013
Northern NJ
Smart decision to stay out of the Pool Store. According to TFP guidelines with a CYA of 90 your FC should be 9-11. See FC/CYA Chart

The CYA is on the high side and you either need to drain 50% of your water to cut your CYA in half or run at higher FC levels. See Draining - Further Reading

Unfortunately your test kit cannot test FC at higher levels. We recommend you get a better test kit, either the TF-100 Test Kits or the Taylor K-2006C.

I suggest you read ABCs of Pool Water Chemistry