First year pool owner, and I left my pool open over the winter because by the time my pool deck cured fully most of the leaves had fallen so I decided against a cover. Over the winter I felt like I was doing a pretty good job, I'd get leaves out daily and added shock to the pool every couple of weeks or when I saw the hint of any algae. So forward to spring, my water looks great but I noticed some small areas of what looks like sand in on the bottom but when I brushed them they poof away. its the same spots every time shallow end near the left skimmer near the seam. Store associate said it was mustard algae so on his recommendation I purchased Yellow Out, 12 pounds of shock (powder plus) and administered over a 36 hour period to get rid of it. After a week i thought I had got rid of it but after putting pump back on 14 hour schedule I noticed today that its back. I live in southeast Virginia and there's a significant amount of trees around me, the pollen has been a beast around here and I'm wondering is there any chance that's what it is? My pool builder looked at it and said it wasn't mustard because it was just in the seams. He said to it was finite junk the filter couldn't catch and said to vacuum to discharge. Any way i'm pretty frustrated, this was to be our first full summer with the pool and I think I have something...can anyone help me out
We had a good rain storm last night and I had to drain a little bit of the pool and i'm wondering if I should shock it based on pool school procedures. I noticed in the shock segment it recommends the overnight test for algae, should I do that to test for algae? One thing I noticed under shocking was to bring PH levels down before shocking but Yellow Out directions say to raise PH to 8.0 before using yellow out... that sound contradicting to me. Any help is greatly appreciated.