Keep the filter running. The chlorine kills the algae, but the filter removes it from the water, and sometimes it can take awhile, depending on how bad your algae bloom was.

With a CYA of 90, you need to keep your chlorine in the 5-10 range. However, your CYA is on the upper end of that range, so I would keep the chlorine closer to 8-12 if it were my pool.


Janet