Hey all. I’m both new here and a new pool owner. We put in an in-ground pool this summer and it’s been great. My water was perfectly balanced until recently. This may not be great but I had been using Clorox brand 3” stabilized tablets with no apparent issues. I recently switched to In The Swim tablets and my chlorine levels dropped immediately. I literally have 0 readings in both free and available chlorine despite more than enough tablets in the floater. I used several brands of test strips and also a water testing kit to verify this. My other chemical levels are within range and look correct.
The pool shop says I have chlorine lock so I drained part of the pool, refilled and tried again. Still no chlorine readings. In The Swim says its not defective tablets. So I used a non-chlorine shock to oxidize the water. No clue if that worked because I still have no chlorine readings.
I shocked with chlorine shock and I do now have chlorine levels showing which makes me suspicious that I don’t have chlorine lock and that my In the Swim tablets are defective.
Does anyone have any advice? Should I buy another brand of tablets to see if I can maintain chlorine levels?
The pool shop says I have chlorine lock so I drained part of the pool, refilled and tried again. Still no chlorine readings. In The Swim says its not defective tablets. So I used a non-chlorine shock to oxidize the water. No clue if that worked because I still have no chlorine readings.
I shocked with chlorine shock and I do now have chlorine levels showing which makes me suspicious that I don’t have chlorine lock and that my In the Swim tablets are defective.
Does anyone have any advice? Should I buy another brand of tablets to see if I can maintain chlorine levels?