Re: Mustard Algae? How to get rid of it?
Mustard algae is very difficult to get rid of. Chem Geek did a chart on chlorine levels to fight mustard algae. With a cya of 80, he suggests taking the shock level up to 30ppms, and keepig a minimum of 12ppms chlorine even when it is gone He suggeast a shock level of 60% of the cya level, and minim at 15% of cya level to keep it away once you have it. He also suggest lowereing the ph to 7.2 before shocking which will make the chlorine more effective. He suggest to do this before shocking because high chlorine levels will give a false reading of ph. The only real way to get rid of the mustard algae it to really kill it with very high levels of chlorine, and to keep the chlorine high (15% of cya level) for a long time, because even if a spore of it is left, it will grow again. That's why people think they are getting it back, when in reality it was never really all gone . Hope this helps, feel free to ask any other questions you may have.
16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5