When I got home last night & rechecked the chlorine it was once again at zero. I then added 2 gallons of 12.5% shock & approx 91ozs (1/2 of 1.42 GAL) of 6% bleach. This brought the chlorine reading back well over the 5ppm limit on my tester (probably around 12). I did not have time to buy distilled water last night to do the diluted X 2 test but will buy some tonight.

I then re-tested at about 10:00PM and the chlorine level dropped to about 5ppm. I then added 2 more gallons of 12.5 shock. This morning at 6:30AM the chlorine level was still at 5ppm! Yippee!! This is the first time in 1-1/2 weeks that I had a chlorine reading in the AM!

My wife just re-checked at 9:30 this morning and the Chlorine is still at 3.6ppm. I didn't have her add anything but asked her to re-check at around noon & let me know.

Thank you Watermom!! I think I finally see some light at the end of the tunnel.

What chlorine level should I strive for? should I still be superchlorinating to 12PPM?

Prior to posting here for the first time yesterday, I was in the process of changing out my water. Monday evening my CYA was at 30 as I was pumping out & refilling water after starting out at 100. When I rechecked the CYA last nite after a few more hours of water changing yesterday AM, the CYA was something < 30 (which is the lowest limit on my cheap tester) so I am not surprised that the chlorine is diminishing. I don't want to add any stablizer until I receive the K2006 tester that I ordered yesterday.

What is the recommended CYA reading? I'm cautious to add any as I had a previous bad experience with too much in the past after I was "pool-stored".

Thanks again for all of your help.