Doughboy Liner Damaged by Chlorine?

[rajung]

Well I thought all was good and I know this is an older post but just received this email.

[Related to: http://www.poolforum.com/pf2/showthread.php/22676 - PoolDoc]

I trust you are finding opportunity to enjoy your pool this summer in spite of the cooler temperatures. I’m writing to let you know that although we are honoring the warranty discount you were given on your liner, Doughboy has denied the claim internally. This has no affect on our transaction with you as I’m choosing to maintain our position.



The reason for their denial is that the liner has evidence of over-chlorination. Oils inherent to the vinyl are pulled from the material when over-chlorination is present. What remains is a brittle material that in this case cracked at the seam. A warranty liner replacement defective from manufacture would actually separate at the seam.



I write this to encourage you in proper maintenance of your pool. We suggest you maintain chlorine levels of 1-3 ppm and immediately brush up any powder residue after shocking your pool. This will help maintain the color and the life of your liner.



Please note that any claims in the future which are indicative of over-chlorination will not be honored by Doughboy or by Pool ####. I trust you will understand this position and please let me know if you have any questions.



We are very grateful for your business!

I was using 2 bioguard sticks in the skimmer per week as instructed by my pool store salesman, and it did fade the liner around the return after 9 months which I thought was normal since it was coming out a short distance away from skimmer.
At the time my CYA levels were at 90 and I was keeping my FC at 8-9ppm.
This year in March after liner replacement I had and have had a stabilizer level around 50ppm and have been keeping the FC around 5-6ppm.
Should I dump a bunch of water out water to get the CYA level down to 20ppm as to get the FC level to 3ppm as they say, or is this a bunch of you know what as to get out of warranty?
Totally confused now as to stabilizer/FC relationship.
I thought the higher CYA the higher FC had to be and lower CYA the lower FC?
Also, after liner was put in I tossed the bioguard stuff and have been using bleach,not adding into the skimmer but about a foot out in front of the return stream to avoid any fading ad the return area of liner.
I am thinking since the liner was faded around the return about 2 inches around it they were quick to assume to much biocrap and not knowing what the stabilizer levels were and why FC level was at the level it was due to that.