Lenny,

I've had the mesh cover since I built the pool.

1st year, no SWG running, drained 18" water and closed pool. Over the winter, water level rose, I drained again at one point in the spring, prior to open. Opened to clear water, silt, worms etc on bottom. Vacuumed, shocked, balanced water, everything was great, plaster was clean and smooth.

2nd year, SWG operational, drained 18" water and closed pool. Over the winter water level rose, I drained again at one point in the spring, prior to open. Opened to clear water, silt, worms etc on bottom. Vacuumed, shocked, balanced water, but this time everything was not so great. Extremely rough pool walls and bottom with the horizontal surfaces tan/stained in color. To date, nothing has been successful in removing.

My in season water balancing, closing, and opening procedures did not change at all. I am not convinved that the SWG and saltwater pool had anything to do with my problem, but it is the only change I am aware of, so it at least makes me curious.

Pat.