Just Added a SWG

[WanderingPop]

Hi All,

I just had an IC40 installed in my pool. Still working on getting the salt level correct before firing it up. Looking at my results, I can see that my FC is low, should I correct that before turning on the SWG? Are there any other pitfalls I should be looking out for?

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Chemical Addition 06-25-2022 @ 04:02 PM
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+ 1 Gallons of MuriaticAcid14

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Test Results 06-25-2022 @ 02:51 PM
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Salt: 3350
CSI: 0.55

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Chemical Addition 06-25-2022 @ 02:16 PM
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+ 80 Pounds of Salt

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Maintenance 06-25-2022 @ 02:16 PM
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Brushed

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Test Results 06-25-2022 @ 08:20 AM
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Salt: 2700
CSI: 0.58

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Chemical Addition 06-24-2022 @ 07:40 PM
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+ 160 Pounds of Salt

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Test Results 06-24-2022 @ 07:11 PM ***Before adding any salt.
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Free Chlorine: 1.1
Combined Chlorine: 0.0
pH: 7.8
Total Alkalinity: 135
Calcium Hardness: 620
CYA: 51
Salt: 1752
Temperature: 83°F
CSI: 0.65

 

[Rancho Cost-a-Lotta]

Can you post a full set of test results from your TF-100 test kit. Your TA and FC show results not consistent with your test kit.

I can see that my FC is low, should I correct that before turning on the SWG

Yes. Get FC to target level for your CYA (FC/CYA Levels) and set the SWG to match daily FC loss. If you're not sure what your daily loss is, set up the SWG to produce 4 ppm of FC and adjust from there.

 

[WanderingPop]

Can you post a full set of test results from your TF-100 test kit. Your TA and FC show results not consistent with your test kit.


Yes. Get FC to target level for your CYA (FC/CYA Levels) and set the SWG to match daily FC loss. If you're not sure what your daily loss is, set up the SWG to produce 4 ppm of FC and adjust from there.

Thanks for the reply Rancho. Also, good catch. The latest numbers are results supplied by the pool store...I didn't have a way to test for salt (new kit in the mail) so I had my water tested there.

Can you post a full set of test results from your TF-100 test kit. Your TA and FC show results not consistent with your test kit.


Yes. Get FC to target level for your CYA (FC/CYA Levels) and set the SWG to match daily FC loss. If you're not sure what your daily loss is, set up the SWG to produce 4 ppm of FC and adjust from there.

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Chemical Addition 06-26-2022 @ 06:57 AM
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+ 44 FluidOunces of Bleach

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Test Results 06-26-2022 @ 06:35 AM
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Free Chlorine: 1.0
Combined Chlorine: 0.5
pH: 7.5
Total Alkalinity: 150
Calcium Hardness: 750
CYA: 50
Salt: 3350
Temperature: 83°F
CSI: 0.41

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Chemical Addition 06-25-2022 @ 04:02 PM
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+ 1 Gallons of MuriaticAcid14

 

[Rancho Cost-a-Lotta]

Until you get your SWG online, handle the pool as a liquid chlorine pool. Get FC up to target level (FC/CYA Levels).

You can use "Effects of Adding Chemicals" in Pool Math to calculate the output percentage of the SWG based on how long you run the pump. Running your SWG 24/7 @ 100% should increase FC by 11 ppm.

As your calcium level continues to rise due to evaporative top-offs, your CSI will become harder to manage. You may experience scaling and flakes from the SWG cell. Try to keep CSI in the range of 0.0 to -0.30 to reduce scaling tendencies. Lowering TA and keeping pH on the lower end of the range will bring CSI down.

Calcium Saturation Index (CSI)

How is CSI calculated? Very simple – use our PoolMath tool. To ensure long plaster life and save money, click here to learn more.

www.troublefreepool.com

Calcium Scaling

Calcium scale on your pool is something we all want to avoid. With some elbow grease and a pumice stone for pools we can help you remove this eyesore.

www.troublefreepool.com

You may need a water exchange to reduce CH soon. If you have access to softened water, find a way to connect to the pool fill line. Some of use portable RV softeners, but they're a bit of a pain to manually flush (link in my sig).

 

[Rancho Cost-a-Lotta]

Here's an article on lowering TA. It's a bit of challenge, particularly if your fill water has high TA content.

Lower Total Alkalinity

A lower Total Alkalinity level can help a pool owner stabalize their pH increase. We'll explain how to lower TA with a little help from muriatic acid.

www.troublefreepool.com

 

[WanderingPop]

The TA of my feed water tested at 120

 

[Rancho Cost-a-Lotta]

The TA of my feed water tested at 120

That's not "high," but it is higher than the recommended range of 50-90 ppm, so fill water will constantly try to pull up TA. My TA fill water is 130 and it's a bit of battle trying to maintain 80 ppm in the pool.