I have been fighting what I believe is a yellow or mustard algae for about 2 months now. I used two different algae killers, then learned from TFP that was an unnecessary expense. Since I have slammed at least three times. I am in the middle of another slam now. Water is beautifully clear, and has been. FC is holding at 5ppm, CYA holding at 30-50 ppm, PH was 7.2 when I started, but cannot get rid of this stuff. It passes the “poof” test for algae. Is it algae? Let me add that I brush twice a day at slam levels and run my Polaris. I have also manually vacuumed it up and it just keeps returning. It’s the gift that keeps on giving!!
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