We bought a house recently that has a 20x40 8ft deep pool with a diving board. I calculated it to be roughly 33000 gallons. I had to repair the aqua rite board by soldering on a new voltage limiter and replaced the pump. Everything is nice and clear but i took my water to the local pool store to test and they only recommend i add 1/4 gallon of muriatic acid based on the test results. They use a centrifuge style computer system for their water testing, not vials and chemicals. I have read the ABCs of water chemistry here on this site and what they say does not match up. Can anyone advise me on these test results.
Salt water pool
33000 gallons
Vinyl liner
Free Chlorine - 7.27 ppm
Total Chlorine - 7.52 ppm
Combined Chlorine - 0.25 ppm
Recommended range by lps 2-4 ppm.
I asked them if I should turn down the salt generator and they said no.
pH - 8.0
Recommended range by lps 7.2-7.8
They want me to add 1/4 gallon muriatic acid.
Hardness - 171 ppm
Recommended range lps 175-350 ppm
The ABCs of water chemistry article state this doesnt matter and can be 0 because I have a vinyl liner.
Alkalinity - 43 ppm
Recommended range lps 80-120 ppm
ABCs of water chemistry shows range of 60-120 ppm and states this being low can cause pH swings but the lps stated not to do anything thats it is fine.
Cyanuric acid - 54 ppm
Recommended range lps 40-100 ppm
ABCs of water chemistry shows range of 70-80 ppm. Should I raise this?
Copper - 0.9 ppm
Recommended range lps 0-0.3 ppm
Pool store told me to do nothing even though the results are high.
Phosphate - 0 ppb
Recommended range lps 0-500 ppb
Salt water pool
33000 gallons
Vinyl liner
Free Chlorine - 7.27 ppm
Total Chlorine - 7.52 ppm
Combined Chlorine - 0.25 ppm
Recommended range by lps 2-4 ppm.
I asked them if I should turn down the salt generator and they said no.
pH - 8.0
Recommended range by lps 7.2-7.8
They want me to add 1/4 gallon muriatic acid.
Hardness - 171 ppm
Recommended range lps 175-350 ppm
The ABCs of water chemistry article state this doesnt matter and can be 0 because I have a vinyl liner.
Alkalinity - 43 ppm
Recommended range lps 80-120 ppm
ABCs of water chemistry shows range of 60-120 ppm and states this being low can cause pH swings but the lps stated not to do anything thats it is fine.
Cyanuric acid - 54 ppm
Recommended range lps 40-100 ppm
ABCs of water chemistry shows range of 70-80 ppm. Should I raise this?
Copper - 0.9 ppm
Recommended range lps 0-0.3 ppm
Pool store told me to do nothing even though the results are high.
Phosphate - 0 ppb
Recommended range lps 0-500 ppb