New here, and looking for help!!
We have what appears to be brown algae in our pool that won't scrub off. A little background: 23000 gallon pool with a Hayworth sand filter (not sure how big of a pump). The pool wasn't holding chlorine, so after reading this site end to end, I decided to shock with liquid chlorine. Here are my new measurements:
These measurements are based on a basic chlorine/Ph kit and a strip to measure CYA. I know this isn't recommended, but I haven't gotten my hands on a better kit yet (new pool owner).
I'm assuming the algae is dead because the FC level has been steady at 20 (and won't go down- which is another problem for another thread, I think). I tried to brush and vacuum today, but the algae won't budge! What's going on?