Voldaddy,

I would bring your Cl up to 15 +. Keep in mind I am an agressive (but accurate) bleach user so here's my thinking:

Your last CYA test you said was 30-40 and you added 2lbs since (12ppm) so now you could easily be in excess of 50CYA

Ben's "best guess" says if your CYA is that high, 15ppm is breakpoint and 20ppm is breakpoint for CYA of 60.

Lastly, your Cl will start to diminish instantly...particularly since you seem to be working on something. You will probably never reach your intended target.....but you'll get very close.

Do I think you're in danger of bleaching your liner at those levels?....No

Will I buy you a new one if I am wrong?.....no, again

My .02.