ok Ill try to make this easy???? 28ft round above ground useing baqucil for the 4th year, sand filter, living in milwaukee wis, cant aford this stuff any more its killing me money wise, this year open may 31, little cloudy its june 13 water is almost perfect, had my water tested yesterday they said my baquacil was at 5???? I thought it was at 30-50??? they said add 6 and a half pints to bring it back up, 65dollars later its back up , i keep a clean pool upkeep every day, this costs me 400- 500 dollars a year, as all my friends with other systems use alot less $$$$, I want to switch over next year May my ???? is wy cant i drain my pool and start all over, fresh then i dont have to make this chemical switch, cant i drain my pool way down and then add fresh water help me??? I only know this way, its not real bad buts its way to$$$$$$$$$ for me want to switch. thanks