Thank you for the advice! I will check out a chlorine reducer, getting the FC back to normal was my biggest concern. There used to be skylights, they were removed this spring when the entire room had to be re-drywalled due to mold. The pool hasn't been used in over three years, and the liner had fallen in. The dehumidifier went down, and the moisture took control. This past winter, we replaced the walls, ceiling, pool liner and repaired the dehumidifier, and we couldn't be happier! Next step is to put down some qualify moisture resistant flooring, thinking rubberized pebble floor. It's comfortable to walk on, slip and moisture resistant, and easy to maintain!