Changes in Chlrine Loss

[CANAPOOL]

I have been testing (probably over testing) my new pool and doubled my chlorine levels (not to full slam levels) until the overnight chlorine loss test passed; this was a recommendation -- instead of a full slam -- obtained in the forum since I was loosing exactly 1 ppm of Chlorine overnight and the water looked sparkling. The pool had not been used up to this point.

Then we started using the pool and after about a week, I decided to perform a overnight chlorine loss test and it lost 2 ppm! is this normal when actively using a pool? is the pool safe for continuous use?

During this period Chlorine hasn't drop below 3 ppm and CYA is between 20-30; I am still increasing CYA, just being careful since I don't want to overshoot.

Thanks

 

[pooldv]

Losing 2 ppm overnight is a sign of something brewing in the water. A quick SLAM Process should take care of it.

 

[oldguy70]

Which test kit are you using? and how are you testing?...sometimes I get to the point of trying to be so precise, I out-trick myself in seeing what is Not there

Also if you could post of full set of tests, that is very helpful

 

[CANAPOOL]

I have the TF-100 Test Kit and I obtained the result using the FAS/DPD Chlorine test. I will test again tonight (I probably out-trick myself sometimes as well) and if I lose more than 1 ppm will proceed with a slam.