Hey everyone, I was wondering if anyone had any thoughts about why my pool is eating chlorine:
I have a fairly new pool, that's mostly shaded (3 month old Pebble-tech pool with SWG). The builder monitored the chemicals for the first 2 months. Everything was in the perfect range the whole time, but chlorine was a bit high every time I tested it (4 to 4.5 ppm) so I kept reducing the output of the SWG (eventually it was reduced to 20%). When the company stopped servicing the pool, chlorine dropped to 0. I found out later that every week, they'd add a gallon of liquid chlorine because it was low. I would test the pool myself later that day and find it high, and I thusly lowered the SWG. The cycle continued this way until they stopped coming and I started taking samples in to Pinch-a-Penny).
Since then, everything checks out. They even did a phosphate check and found nothing. However, the SWG is on 100%, 10 hours a day. The pool tests at 0 PPM. Pool company was called and they tested the SWG. They say it's working fine. Samples directly from the returns show chlorine (@ about 1PPM).
I added 1.5 gallons of liquid chlorine last Friday. Tested 4 ppm after a few hours. The next day, 1ppm. I added another half gallon and it jumped to ppm. The next day, 0. Water has always looked clear and perfect. But it is eating chlorine. How is this possible?
Total and free Chlorine: 0ppm
PH: 7.6
Alkalinity: 90PPM
Calcium: 350ppm
Stabilizer: 60ppm
salt: 3500ppm
I have a fairly new pool, that's mostly shaded (3 month old Pebble-tech pool with SWG). The builder monitored the chemicals for the first 2 months. Everything was in the perfect range the whole time, but chlorine was a bit high every time I tested it (4 to 4.5 ppm) so I kept reducing the output of the SWG (eventually it was reduced to 20%). When the company stopped servicing the pool, chlorine dropped to 0. I found out later that every week, they'd add a gallon of liquid chlorine because it was low. I would test the pool myself later that day and find it high, and I thusly lowered the SWG. The cycle continued this way until they stopped coming and I started taking samples in to Pinch-a-Penny).
Since then, everything checks out. They even did a phosphate check and found nothing. However, the SWG is on 100%, 10 hours a day. The pool tests at 0 PPM. Pool company was called and they tested the SWG. They say it's working fine. Samples directly from the returns show chlorine (@ about 1PPM).
I added 1.5 gallons of liquid chlorine last Friday. Tested 4 ppm after a few hours. The next day, 1ppm. I added another half gallon and it jumped to ppm. The next day, 0. Water has always looked clear and perfect. But it is eating chlorine. How is this possible?
Total and free Chlorine: 0ppm
PH: 7.6
Alkalinity: 90PPM
Calcium: 350ppm
Stabilizer: 60ppm
salt: 3500ppm