Background: We have a couple of large trees close to the pool & they have been dropping leaves since mid-October (and still going on). We put a LEAF NET over the pool mid-October with a blue Solar cover under that. We left it like that for about 4 weeks, not removing it as it continued to catch leaves. About 10 leaves made their way under the covers and into the pool bottom. We have been continuing to run the Filter (Cartridge) about 5-6 hours per day as well as the pool sweep (although not very efficient, obviously, seeing the leaves on the bottom). I'd been adding some Chlorine throughout these 4 weeks while covered (pool temp is down to around 60) to maintain FC 5.0 ..
So we removed the net & solar cover to find a somewhat greenish tint to the water. There were some yellowish deposits visible on the steps (fiberglass/solid), so I brushed them - this resulted in some yellowish fine debris. That debris is all over the bottom - everywhere I brush. I've been running the pump/filter 6-8 hours per day now and brushing daily, but this stuff is still visible, although the water "seems" to look a little better.
I checked my FC (7.0) and my CC (0.0) ... and have been brushing daily, with the same stuff being swept up. PH is around 7.3 - and I don't seem to be losing any FC.
So, any idea what this is & do I need to SLAM it? Is this Yellow MUSTARD algae? I'm kind of surprised that with the FC level I tend to maintain that this could happen.
Thanks in advance.