Re: top of liner pool water
I'm not sure what javex is, so not sure if it'll help you or not. The only danger to water from the cover getting into the pool is that it might have taken some "trash" in with it--leaves, dirt, etc. but that can always be vacuumed out. You may or may not have green water when you open, but that can always be handled with bleach.
Janet
Re: top of liner pool water
Javex is a brand name of bleach from Colgate-Palmolive. Not sure if its available in the US , but it is here in Canada.