Last fall we didn't get around to cleaning all the leaves out of our pool cover after they fell. Long story, part lazyness and part too many ****ed trees that dumped all their leaves into the pool at once just before things froze up for the winter.
Anyhow, I was out today starting to clean up the mess and get them out, pumping water off the cover, etc. I started pumping off water a few weeks ago as the spring melt took hold (There was several feet of snow and ice from yet another brutal winter here) but just today I got enough off where I could start inspecting things.
FWIW I'm still probably 3 weeks from wanting to open the pool but I like to start getting things ready around now.
Anyhow, I peeled back the cover around my stairs and immediately noticed some concerning stains. I'm going to guess that they're a direct result of all the tannins from the leaves sitting on the cover and some of that stained water going through the winter cover into the water underneath.
I got out my vinyl and stairs cleaner and a bristle brush and had limited success. I went and got some liquid cholorine and worked with that and had good success on the stairs (they cleaned right up) but the liner, not so much.
How should I tackle this? I'm now contemplating removing the winter cover today if I can (There's still some spots with ice), raising the water level above the stains (which are now above the waterline, see pics), and hitting the pool with some chlorine so that the stained area is sitting underneath the water level.
IMG_5800 by oshawapilot, on Flickr