Hey everyone.... glad to be back for another season. Just filled my pool from my underground aquifer and tested it with my NEW K100 test-kit. Cl. below .5; Br. below 1; Ph. below 6.8; FC-0; Calcium hardness-250ppm; Total Alkalinity- 60 and cya-0. Pool is clear but I know that will change if left untreated. What and how much do you suggest I need?