What causes algae growth? I got sick awhile back and let my FC drop to 0 for a few days and got algae. I followed the steps, passed the OCLT and have kept my FC at atleast 5 since then. Today, I have algae again! The water is crystal clear and has been for a few weeks. I will get a set of numbers in about 20 minutes.
It has gotten cooler here and we have had quite a few cloudy days but I am running my pump 8 hours a day and keeping my FC up. Should I be shocking from time to time even if my FC is good and nobody has been in the pool?