I've been fighting this battle for 10 years, and no one has given me workable solution. My pool is 9000 gallons, fiberglass/ceramic, and is covered during the winter. Water is extremely hard and very high ph (Las Vegas). I use triclor. Within several weeks of opening the pool, the ph drops dramatically. I continually add ph increase on a weekly basis, which, in turn, dramatically raises total alkalinity and scaling begins. Some have suggested adding muriatic acid to drop the alkalinity, which, in turn, drops the ph. Others have suggested not worrying about the alkalinity. I usually just end up dealing with having to raise the ph, live with the higher alkalinity, brush away the scale, and change out half the water each spring. Any advice?