I have had a pool for a few years now and always battle mustard algae which is extremely annoying. Recently I used Yellow Out with a bunch of chlorine and it worked for a few weeks, however, it is back. I even used algae preventer weekly after it was gone this last time.
My pool guy tells me that algae can not really grow when the chlorine levels are high, therefore I have been keeping my chlorine levels quite high (when measured with test strips).
Is the chlorine level the only important reading to help prevent algae? For example, can mustard algae grow if the PH is too low, etc??
Thank you - I really want to understand how to prevent it!