Opened pool for the 2nd year in a row with same trouble!!!
Closed pool with a chlorine reading of 9.7 & crystal clear water. Early Spring storm blew off our cover & some of the rain water & debris went into the pool! Took a water sample in to our pool place & were told not to follow the directions, just to put 50lbs of bioguard super soluble & 28 gallons of liquid chlorine in over a period of 2 days. We were told that it is in "chlorine lock". Chlorine registered at 0.3 when first opened before adding anything. We went through this "chlorine lock" business last year & just about went broke....not doing it again this year. We purchased our test kit & want to try on our own. These are the results we got:
Ammonia = Between 1-3
PH = Not registering (Yellow)
Acid Demand = we ran out of room after adding 35 drops
Cyanuric Acid = 54PPM
Calcium Hardness = Purple After 7 drops it stayed purple
FC = 1.2PPM
CC = 0.6PPM
Total Alkalinity = 160PPM
At this point filter needs backwashed!!
Where should we go from here????