I've been taking care of a pool for about 5 years now and every time its opened it requires 4 pounds of shock twice per week for about a month to bring the chlorine to a stable level. I will shock it on a Monday and by the time I return on Thursday the Chlorine level will be hovering near 0, even with the addition of 6-8 chlorine tabs each visit. Here are the stats on the pool:
-25K gallons
-sand filter
-in-ground
-vinyl liner
-Do not know the flow rate of the filter or the size of the pump
And here are the test results from yesterday (May 17):
pH: 7.2
TA: 100 ppm
FC: 0 ppm
TC: .3 ppm (may have been a residue leftover from my personal pool, which has chlorine around 5 ppm)
CH: Unknown
CYA: 100 ppm
-Clarity of the water is great, it has been used every season for the past 5 years. It was in fairly good shape when it was opened April 30.
This year, the owner wanted the pool open early, so I have attempted to expedite the chlorination process by using 8 pounds of shock instead of 4 the past couple visits. I've put in nearly 40 pounds of shock since the pool opened and have been consistently adding chlorine tabs but the level will still not hold in the ideal range. Anyone have any theories as to why this is happening or how I could rectify it?
-25K gallons
-sand filter
-in-ground
-vinyl liner
-Do not know the flow rate of the filter or the size of the pump
And here are the test results from yesterday (May 17):
pH: 7.2
TA: 100 ppm
FC: 0 ppm
TC: .3 ppm (may have been a residue leftover from my personal pool, which has chlorine around 5 ppm)
CH: Unknown
CYA: 100 ppm
-Clarity of the water is great, it has been used every season for the past 5 years. It was in fairly good shape when it was opened April 30.
This year, the owner wanted the pool open early, so I have attempted to expedite the chlorination process by using 8 pounds of shock instead of 4 the past couple visits. I've put in nearly 40 pounds of shock since the pool opened and have been consistently adding chlorine tabs but the level will still not hold in the ideal range. Anyone have any theories as to why this is happening or how I could rectify it?