u/deeplyprobing

I use Aquachek 7, Easytest strips and HTH chemicals kit to monitor primarily chlorine levels. The strips sort of match each other but the chemical kit is waaay off. If strips read 3, the kit shows over 5 like off the references. Only when the strips show zero does the kit shows 3. All numbers for total chlorine.

Same with cyanuric acid readings. Not waay off but still large discrepancy.

pH readings are in agreement.