We had a warm weekend two weeks ago so we opened the pool and have the water adjusted near perfectly! We bought a solar cover for the first time (pool filled last year at end of July so there was no need for it last season) and have had it on the pool for maybe 10 days. It hasn't been warm enough to swim yet so it's been on this whole time. I am now noticing fluffy yellowish algae growing in the water on top of the cover. How do I clean it up without it falling into the pool water and is there a way to prevent this in the future?

Thanks!
Lee