For the last two years, in October, when my solar cover has been on the pool for a couple of weeks, I've noticed my chlorine level drops to zero. With a SWG, this is not good, so I start adding liquid chlorine. I read some old posts 2008 and prior regarding negative impacts to pool chemicals with covers. The posts seem to focus on potential algae development both on or below the cover causing excessive amounts of chlorine depletion. I also read a posts citing a reduction in the ability of the sun and the chemicals to correctly interact causing a problem.
In my case, I don't ever have visible algae and normally my chlorine level is maintained at 5ppm. I could certainly supplement the SWG with liquid to ensure proper level maintenance while the cover is deployed. I live in Florida and normally only use the cover in late fall and early spring for 3-5 weeks each season to extend pool use. My pool store suggested trying the "liquid cover." After reading numerous articles, on this site and others, reviews seem to be mixed as to the effectiveness and chemical contribution to the pool, so I'm leery regarding its use.
Looking for advice about how to handle. Should I remove the cover "x" number of times per week as a matter of course to let the pool "breathe" or simply enhance chlorine dosing with the liquid?