Another . . .new PS234 results on "new" pool

New plaster IG pool here. Just got my kit yesterday and everythin glooks pretty good -

FC - 3.0
CC - 0.0
TC - 3.0
PH = 7.7 (less than 7.8 but higher than 7.5)
ALK = 100
CAL = 210
CYA = 30
Temp = 84
SALT = 4600

I expected similar results based on the fill water and what I have been doing over the past few weeks. Although, I am surprised that the CYA is not higher as I added 12 #'s CYA since I filled the pool (over past 4 weeks). Based on the Calculator my CYA should be around the 50 CYA recommended by the SWG company.

Q1 - The SWG manual says the minimum CYA is 50 for operation (I would rather stay lower, should I stay with what the SWG company reco's?)?

Q2 - Calcium seems low. For a new plaster pool what is the recommended range for this?

Q3 - I am fairly sure that the salt calculation is high (4600). I only added 720 #'s of salt to a 30,000 gallon pool (pool size is pretty accurate based on the shipped in truck water). Based on the salt I added, the ppm should be around 2800 + salt in the fill water (around 200ppm - is that possible?) = 3000 ppm. The SWG concurs and reports between 3000 - 3100 ppm. Still have problems with the salt calc? BTW - I repeated the test 3 times with similar results

Any other tips is appreciated!

Thanks
John

I'm going to move this to the saltwater forum where I think you may get more responses from people who have experience with SWC/SWG.

Quote:

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Originally Posted by JonnyG

New plaster IG pool here. Just got my kit yesterday and everythin glooks pretty good -

FC - 3.0
CC - 0.0
TC - 3.0
PH = 7.7 (less than 7.8 but higher than 7.5)
ALK = 100
CAL = 210
CYA = 30
Temp = 84
SALT = 4600

I expected similar results based on the fill water and what I have been doing over the past few weeks. Although, I am surprised that the CYA is not higher as I added 12 #'s CYA since I filled the pool (over past 4 weeks). Based on the Calculator my CYA should be around the 50 CYA recommended by the SWG company.

Q1 - The SWG manual says the minimum CYA is 50 for operation (I would rather stay lower, should I stay with what the SWG company reco's?)?
50 ppm is fine for the CYA but I would not let it go lower until you are more familiar with SWCG.

Q2 - Calcium seems low. For a new plaster pool what is the recommended range for this?
Calcium level is fine. It will start to go up as you brush and vacuum to waste.

Q3 - I am fairly sure that the salt calculation is high (4600). I only added 720 #'s of salt to a 30,000 gallon pool (pool size is pretty accurate based on the shipped in truck water). Based on the salt I added, the ppm should be around 2800 + salt in the fill water (around 200ppm - is that possible?) = 3000 ppm. The SWG concurs and reports between 3000 - 3100 ppm. Still have problems with the salt calc? BTW - I repeated the test 3 times with similar results.
Make sure you are dividing the drops by 2 to bring it line with what the SWCG says. i.e. read the salt testing instructions carefully!

Try to get the pH down to 7.2 - 7.4 with Muriatic Acid

Any other tips is appreciated!

Thanks
John

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Have fun with your pool.

Pat

John,

Are you sure your pool is 30,000 gallons?
720 lbs of salt (plus the 200 estimate for the trucked in water should be good for 30,000 gallons). However, for it to increase to 4600 ppm, would mean that your gallons is....gulp....less, approximately 18,000 - 19,000 gallons.

Another possibility is that your salt chlorine generator needs to be salt calibrated. Please make sure, as PatL said, that you followed the directions for the salt test.