Located in Northwest , Indiana. Pool is an in ground, vinyl liner with and emerald shape with sloping deep end sides. Measures 36 x 24 with an estimated 25,000-26,000 gallons of water. I use a sand filter and a 1.5HP hayward pump. I have an automatic chlorinator for the 3"try-chlor tabs. ( I was trying to stay away from use of the chlorinator, as my CYA climbed quite high last summer.
I had huge difficulties getting water balanced and clear, but my chemistry seems to be within parameters. I have ordered the Taylor 2006 kit, but in the mean time measure my own pH and alkalinity, and then use a test strip. I just took a water sample to the pool store which uses a computer analysis. Results FC 2.12, pH 7.6, alk 136, CYA 42, hardness 160 and phosphates 978.
My water is clear but I have a large dark stain that comes and goes on liner in the deep end. The liner is 9 years old and we also had an exceptionally warm winter, with several days in the 70's throughout March and April. The stain has disappeared when I have super chlorinated and/or used an algaecide only to come back. I have also used 3 applications of Revive which helped clear the pool initially and also to have lowered phosphates from 1200 ppm. Following TFP I have put in 152 oz of 12% chlorine in everyday, only to have it used up in 24 hours. Water temp is 85 and air is 95. I do vacuum every other day, and have been backwashing every 4-6 days.
I am seeking advice about the stain, but also about alkalinity and use of alternating between tabs and liquid chlorine.
According to TFP is that my alkalinity is high. I have muriatic acid but I am a little uncomfortable using it, and I also have pH down. What would be the best advice on how to lower it.
Also curious as if I can keep the CYA in an ideal range of 30-40 (or even up to 100) why tabs are so bad. Does anyone else out there alternate between the two forms of sanitation or is that just not a good idea, and if not , why not?
Thank you
I had huge difficulties getting water balanced and clear, but my chemistry seems to be within parameters. I have ordered the Taylor 2006 kit, but in the mean time measure my own pH and alkalinity, and then use a test strip. I just took a water sample to the pool store which uses a computer analysis. Results FC 2.12, pH 7.6, alk 136, CYA 42, hardness 160 and phosphates 978.
My water is clear but I have a large dark stain that comes and goes on liner in the deep end. The liner is 9 years old and we also had an exceptionally warm winter, with several days in the 70's throughout March and April. The stain has disappeared when I have super chlorinated and/or used an algaecide only to come back. I have also used 3 applications of Revive which helped clear the pool initially and also to have lowered phosphates from 1200 ppm. Following TFP I have put in 152 oz of 12% chlorine in everyday, only to have it used up in 24 hours. Water temp is 85 and air is 95. I do vacuum every other day, and have been backwashing every 4-6 days.
I am seeking advice about the stain, but also about alkalinity and use of alternating between tabs and liquid chlorine.
According to TFP is that my alkalinity is high. I have muriatic acid but I am a little uncomfortable using it, and I also have pH down. What would be the best advice on how to lower it.
Also curious as if I can keep the CYA in an ideal range of 30-40 (or even up to 100) why tabs are so bad. Does anyone else out there alternate between the two forms of sanitation or is that just not a good idea, and if not , why not?
Thank you
