Thanks Mom. 100k gallon pool, plaster, indoor, heated to 86-88 deg year-round, remodeled about 1 year ago, liquid chlorine (no salt), sand filters, pH 7.2-7.6, TA 100, Calcium 250, FC 2-5 ppm, old test kit with a Taylor K-2006 on the way. My old kit does not detect any combined chlorine, but I do not trust it. I have searched the forums some and noticed that a low TDS = osmotic pressure on the eye. I guess that my TDS is probably low since the water was new about a year ago. Can I just add salt to a chlorine pool without changing anything else? Thanks again,
Mike