Quote Originally Posted by kjsmom
What is the highest SAFE, NO FADE chlorine level for shocking an inground vinyl liner pool? Last Spring, I was advised on the forum that I could safely go up to 10-12 ppm chlorine for shocking, and I did maintain that level until the water cleared -- about a week.

In August we had a big storm and had to put a patch on the liner -- I was totally shocked at how faded my 2 year old liner was!

We replaced the liner last Fall, and I would like to preserve the color. I called Pacific Pools and was told not to go over 3ppm chlorine, (1 1/2 - 2 ppm chlorine for maintenance); that's a big difference.

If it took a week to clear the water at 12 ppm chlorine, how long will it take at 3 ppm chlorine (the water was pretty nasty dark olive green).
Pat
It depends on your CYA level--at higher CYA levels you have to maintain higher minimum chlorine levels to keep your pool clear. See the "Best Guess" chart (first thread in this forum) for a guide on how high your Cl levels need to be.

Janet