Quote Originally Posted by PoolDoc View Post
Ok. I think I've got the picture.

As a general rule, when you are trying to fix anything with your water, your pool needs to be on 24/7. But, in your case, the problem is OUT of your pool, not IN it. And, since the chlorine is IN your pool, neither it, nor any algicide will do the trick.

Is your solar cover the type that you trim to fit? If it is, have you trimmed it to fit, so it ONLY floats on the water, and doesn't cover the edges at all?

PoolDoc
I think I overstated the distance of the algae from the waterline. It's more like 1/4 inch above and it's in small patches, in the pits between the pebbles. It does seem to be wet in that area, though.

The solar cover is a trim-to-fit type that floats on the water. I only put it on yesterday, so it is definitely not the cause of the algae that's been there off and on for weeks.

I went ahead and brought the Cl. level up to about 18 ppm and the pH is somewhere around 7.4 and going down as I add a little acid at a time. The cover is still on-- should I take it off? Doesn't seem like it will affect what I'm trying to do.


Tabitha