I have been SLAMing the pool for the last 5 days, and our water has gone from murky green to crystal clear/blue. The overnight FC loss is 0.5 ppm, so I think all the algae is dead and gone.
My question is this: with the water appearing crystal clear, I do not see any film or anything on the sides and bottom of the pool, but when I brush it, it stirs up a brown cloud that quickly settles. What is this? Algae residue? Should I be worried the algae is still alive? The CYA level is 97, and the pool has held a constant FC level of 26 to 28 for the last several days.