Re: having possible mustard algae problem 3 weeks now
you had me to do the DE test and none came out the returns.
Sunday afternoon I added 3 pounds of 53% cal hypo and 3 cal hypo tablets to the skimmers.
Monday the FC was 10 ppm.
I intentionally did not do anything the pool yesterday. As of right now, 24 hours later, the FC is 5 ppm.
I have new growth on the shady sides and in the deep end. The brown powder is accumulated on the pool floor, but does not have new growth under it.
I think that the powder is dead algae being returned into the pool.
My question is: where is the LIVE algae? if there was active growth some place in the plumbing or filter then would that explain it? I would figure that algae needed sunlight. We do not have lights in the pool. The skimmers could use a cleaning, but no algae visible there.
If I had to estimate then I would say there is one square foot of visible green algae growth TOTAL in the pool right now. But, I have maybe 5-6 square feet of the brown powder at a time.
Would the drop from 10 ppm on Monday to 5 ppm today be normal? Seems too fast to lose that much chlorine with CYA at 75
30k gal 20x40 vinyl IG pool, Hayward S244T, 2spd 1HP pump, time clock. PF=4
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