I can see how I confused.
After a successful slam, the stains remained. After 2 days or so of the slam, I brushed a light amount of algae from a wall herr and there, but I always maintained my fc high so as to try to combat the stains. I took fc up to 14 and have since, let it drop so as to measure the ph as stated in a previous post. I still brush off a small amount og algae from the walls every other day.
I'm confused as well as to what to do. The slam didn't kill the stains, but it did the algae. After 2 days, I've been battling slight algae and letting g the fc drop to 10.
So,I'm not sure as to how to proceed. Should I slam again? It is a pain. So are the stains, sure.