Quote Originally Posted by cds13 View Post
Quick Question- after shocking the pool (liquid chlorine in the range of 10 ppm), what is the acceptable range of chlorine is it safe to put the solar blanket back on the water without doing damage to the blanket?
It's more a matter of letting the chlorine finish, than it is FC levels alone. It's not FC that damages the cover; it's the volatile (can turn to a gaseous form) CC's that result was the high FC breaks down various 'goo' in the water. There are 2 reasons for keeping the cover off:
1. FC + UV (sunlight) are MUCH better at breaking stuff down, than FC alone.
2. The gases that form need to be released so (a) they are gone from your pool and (b) they don't accumulate under your cover and cause damage.