I have a 20,000 gallon pool with a heat pump and a clormatic salt chlorinator. My pool guy charged $320 to remove the cover and open the pool plus the following charges for chemicals (Baltimore, MD.) Do the prices and amounts of chemicals look reasonable? Total price $521
15 lbs. calcium hardness increaser $22.90
15 lbs. alkalinity increaser $25.10
DE - 25 lbs. $30.85
240 lbs. salt - $50.70
20 lb. cyanuric acid $40.00
4 gallon liquid chlorine $22.00