Hello. I need y'alls opinion on whether I should do a SLAM.
Last night at 8:30 pm when my pump shut off, I went to clean out the basket and saw what I thought was the start of algae on the ledge (a few inches below the waterline) of my fiberglass pool. It was only along one corner, so I brushed it off. I immediately tested chlorine so I could do an OCLT.
FC - 5
CC - 0
Morning Tests:
FC - 4.8
CC - 0
(I used 25 mL sample cuz I wanted the most accurate result)
This morning, I turned SWG to 100% output since I wasn't going to be home all day and wouldn't be able to get LC until this afternoon. I tested FC again at 2 pm today and it was 6 ppm, CC-0. I looked all around the pool, no sign of green on the ledges or anywhere else. I vacuumed to prepare for SLAM, and no sign of algae in the Dolphin. So, water is clear, passed OCLT, no combined chlorine....but I know there was something last night. When I wiped it with a white paper towel, it was yellow-green. So, mustard algae or pollen?
I don't think pollen would settle on the ledge like that in just one area, as I've read here in other threads. Plus, it's an area with little circulation. But, even after all night and day, I didn't see anything resettle in that spot, or anywhere else. I thought mustard algae keeps coming back to the same spot?
So, question is...do I SLAM?? Right now, since it's evening, and things look clear, I'm going to do another OCLT, just to double check. But if I pass tomorrow morning, and still not see any visible algae, should I trust that? I want to avoid a SLAM if I don't need it, but if you guys think I should, then I will. Help!
Today's Results:
FC - 6 (had been consistently 4 lately and last night 5, will test again tonight)
CC- 0
TA-60
PH - 7.8
CH- 160
CYA - ?? ( At 50 dot was visible, at 40 semi-visible, at 30 not visible...so is it 40???)
Salt -Taylor 2800 ( SWG -3100)
Temp - 94