Opening the pool New Jersey cold water

[Paxcou]

Below are my results. I am surprised by the CYA I was expecting lower. The pH is a bit low too. I am wondering if the temperature of the water can influenced those numbers. If not I feel I am starting from a good place this year ! I did not cover my pool and the water looks good visually too.

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Iroquois drive
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Build Type: Vinyl
Volume: 16000 gallons
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Latest Test Result Summary:
FC: 0.0 (25 minutes ago)
CC: 0.0 (25 minutes ago)
pH: 7.1 (25 minutes ago)
TA: 30 (25 minutes ago)
CH: 50 (25 minutes ago)
CYA: 50 (25 minutes ago)
TEMPERATURE: 45° (25 minutes ago)
CSI: -2.22 (25 minutes ago)
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[Mdragger88]

Had the pool been running for a bit before gathering the sample?

 

[Paxcou]

Had the pool been running for a bit before gathering the sample?

An hour

 

[Mdragger88]

Great
You’ll want to get the fc up to target range asap FC/CYA Levels
Note* The cold water can affect the cya test so be sure to warm the sample to room temp before testing again. Some find it easiest to stick the sample bottle in their pocket for a bit.

May want to let it mix a little longer and check ta /ph again before adjusting.
If ta remains low you can use
enough baking soda to get ta to the 50/60 range which will help stabilize the ph.
Use
PoolMath for all calculations.

 

[JoyfulNoise]

Did you let the water sample come up to at least 68-70F before doing the CYA test? Cold water temps can cause false readings, typically false-low readings.

 

[Newdude]

I wouldn't trust CH, CYA or salt for a full 24 hours of mixing. They had however many months to stratify, treat them like new adds that need to mix for a day.

TA, PH and FC also need their typical mix times, and 30 mins is plenty for those.

 

[Paxcou]

Thanks everyone for your help. I will test the water tomorrow, but so far I am impressed by how it looks. This year I did not put winter cover, I took care of it until beginning of November and open it early, I think I'm up to a good year.

 

[Divin Dave]

Below are my results. I am surprised by the CYA I was expecting lower. The pH is a bit low too. I am wondering if the temperature of the water can influenced those numbers. If not I feel I am starting from a good place this year ! I did not cover my pool and the water looks good visually too.

==========================================
Iroquois drive
------------------------------------------
Build Type: Vinyl
Volume: 16000 gallons
------------------------------------------
Latest Test Result Summary:
FC: 0.0 (25 minutes ago)
CC: 0.0 (25 minutes ago)
pH: 7.1 (25 minutes ago)
TA: 30 (25 minutes ago)
CH: 50 (25 minutes ago)
CYA: 50 (25 minutes ago)
TEMPERATURE: 45° (25 minutes ago)
CSI: -2.22 (25 minutes ago)
==========================================

Hi,
Like the other have said, the cold water temp is skewing some of your test results by a little bit, but not by a whole lot. The CYA is the most susceptible to the water temperature. Your test results are not looking bad. The water temp really impacts the CSI a lot too, so don't give any creedence to the CSI until the water gets up into at least the 60s.

There are only 2 things you need to do for now.
Add some chlorine, Target 3-5 ppm. With the water still at 45, there's pretty much no chance of algae growing, so raise that FC up at your leisure.

Bring the pH up to the mid to high 7s. Don't go any higher than 7.8
Once you get the pH up, give it several days to a week and then test the pH again. If it has fallen back down by 2 or more points on the pH scale, then increase your TA to 60 and then raise the pH back to the mid to high 7s again. Give it a week and retest again so you can get a sense of the stability of the pH. Use either aerating of the water or adding soda ash or washing soda to increase the pH. If after a weeek it has not fallen by 2 or more points then leave the TA where it is.

Just as an observation, with a TA of 30, CYA of 50 and CH of 50, there is pretty much zero chance of your pH going up over time. So don't fret about it going too high. If anything, it will go back down.

Other than this, I wouldn't do anything else until the water warms up so you can get some unscewed test results.

 

[Paxcou]

Hi,
Like the other have said, the cold water temp is skewing some of your test results by a little bit, but not by a whole lot. The CYA is the most susceptible to the water temperature. Your test results are not looking bad. The water temp really impacts the CSI a lot too, so don't give any creedence to the CSI until the water gets up into at least the 60s.

[•••]

Other than this, I wouldn't do anything else until the water warms up so you can get some unscewed test results.

Extremely helpful and detailed message. Thanks.