Hello folks. New here and first time poster and I do hope someone can give me an answer.It's a rather long post but I am trying to post as much background info as I can
Location and pool size: We live in Southern Ontario. Concrete Lazy L shape pool 40 x 20- I calculate as an average depth of 6.5 ft. or approx 38300 Gal.
It's equipped with a 1HP pump and a Hayward sand filter model S-220T. We have ran the system for 15 yrs without problems. New sand filter and completely sand blasted and repainted June 05.
Chemical use: Had always used liq. chlorine,stabilizer, occasional algecide and some times chlorine pucks. Kept clean with a Kreepy K.
Last summer after a pool party the pristine look it had at 1PM had turned to a milky looking concoction after being used by about 20 kids. Shocked the pool and in the AM it was almost clear. Brushed down the sides and it took another 2 days to get rid of the white milky water and of course the back washing diluted all the chemical.
At about the same time we switched to Saltwater using a Pentair Intellichlor. Changed the sand in the filter and added the new 1 HP pump. No further cleaning except for the aforementioned brushing. Again the water was pristine and salt content etc verified by pool shop test. After the next wave of Grandkids and friends it was milky again.
I am trying to determine if I have a chemical problem causing this or paint degredation. If I push my brush along the bottom all seems Ok -that area is constantly covered by the Kreepy. The sides are a different story. In the deep end the Kreepy does not come all the way to the top because there is a ledge all around the pool starting from where the shallow end starts to slope to the deep end. If I pass my hand LIGHTLY over an area of the side it feels slippery/ slimy, and in the same area if I rub it hard with my palm it creates the milky condition and it dissipates right away. When I take the brush to it I create a bad milky/cloudy condition.
The only recourse i can see now is to drain ,pressure wash and refill. I dread the thought of having to do that.
Saturday i dumped in 2oL of Liq chlorine and monday another 20L.
Yesterday I brush scrubbed the shallow end side ( test area), created the milky look, passed my hand over the same area and it was ok. This Am I ran my hand over the "test" area, without brushing again and it felt a bit slippery/slimy and there was a SLIGHT "milky" cloud formed. Just back from the pool shop and the readings are:
Pool shop is advising a good scrub of the sides, filter and vacuum bottom and add 1 L of algecide after that.
Any help or suggestions would be greatly appreciated.