New pool owner trying to understand test strip reading

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Walmart is probably your best bet up north. There will be a # stamped on the bottle like milk. 25 (2025) 023 (made on the 23rd day of 2025) and then other #s we don't care about.

Screenshot_20250430_213523_Gallery.jpg

Do simple math in the aisle with 30 day months. 25 100 is 3 full months plus 10 days, so April 10th, 2025.


You want 3 months or less old, the fresher the better. Dig in the back of the shelf, also like milk.
 
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Pas_pool said:
What liquid chlorine do you recommend when I have more time to get it?
Click to expand...
Pool Essentials Liquid Chorine from Walmart.
Pas_pool said:
Also, instead of liquid chlorine, can’t I just up the percentage on my SWG. I lowered it a couple days ago to 20% from 40% after analyzing a test strip. Should I put it back to 40% tomorrow when I turn my SWG back on from adding the salt tonight?
Click to expand...
Sure, you can up the SWG % tomorrow. Are you running 24/7? If so, set it to 80% output.

Still need your signature to know your cell and output% and pump runtime to help you. Fill out your signature.
 
Newdude said:
Walmart is probably your best bet up north. There will be a # stamped on the bottle like milk. 25 (2025) 023 (made on the 23rd day of 2025) and then other #s we don't care about.

View attachment 642000

Do simple math in the aisle with 30 day months. 25 100 is 3 full months plus 10 days, so April 10th, 2025.


You want 3 months or less old, the fresher the better. Dig in the back of the shelf, also like milk.
Click to expand...
Makes sense. I’ll get a couple gallons.
 
PoolStored said:
Pool Essentials Liquid Chorine from Walmart.

Sure, you can up the SWG % tomorrow. Are you running 24/7? If so, set it to 80% output.

Still need your signature to know your cell and output% and pump runtime to help you. Fill out your signature.
Click to expand...
Why so high if you don’t mind me asking? Won’t the FC shoot really high at 80%. What is normal run %?

I’ll fill out that signature now
 
You have low CYA. I have no idea what cell you have or output capacity or pump runtime. It is highly unlikely, even if you run a 2x cell size your pool volume you will not exceed SLAM level FC running for 24 hours at 80%.
Chorine is king. Creating chlorine will stave off any algae growth you have.
I chose 80%, because running at 100% is one of the quickest ways to kill a cell.
For OCLT you need at least 3 FC.
You are at 2.5. with CYA of *mabye* 20.
Slam level fc with cya of 20 is 8.
Likely your cell at 80% *might* increase your FC from 2.5 to 8 maybe not.
Fill out your signature, and post your pump runtimes.
 
PoolStored said:
You have low CYA. I have no idea what cell you have or output capacity or pump runtime. It is highly unlikely, even if you run a 2x cell size your pool volume you will not exceed SLAM level FC running for 24 hours at 80%.
Chorine is king. Creating chlorine will stave off any algae growth you have.
I chose 80%, because running at 100% is one of the quickest ways to kill a cell.
For OCLT you need at least 3 FC.
You are at 2.5. with CYA of *mabye* 20.
Slam level fc with cya of 20 is 8.
Likely your cell at 80% *might* increase your FC from 2.5 to 8 maybe not.
Fill out your signature, and post your pump runtimes.
Click to expand...
I just added my signature with all details of equipment. I was confused why I had to add it there as it lists it under my name when I post because I updated my profile on here.
I’ll have my wife go out and get some liquid chlorine at the local pool store tomorrow.

As for pump run times the pump is set for:
8-10am is high speed
10am-8pm is low speed
8pm-10pm on medium speed
10pm - 8am is off
 
I see your signature. Thanks!

You have a variable speed pump. No reason to run at high speed. You run your pump for a reason.

Read the section on "pump runtimes" here:

Pump Basics - Further Reading

www.troublefreepool.com www.troublefreepool.com

Pas_pool said:
I’ll have my wife go out and get some liquid chlorine at the local pool store tomorrow.
Click to expand...
Make sure she knows how to decode chlorine production dates to ensure quality. Have her observe where it is being stored.

Chlorine Date Code Decoder - Further Reading

www.troublefreepool.com www.troublefreepool.com

Breakdown of Bleach Over Time by Storage Temp - Further Reading

www.troublefreepool.com www.troublefreepool.com
 
PoolStored said:
I see your signature. Thanks!

You have a variable speed pump. No reason to run at high speed. You run your pump for a reason.

Read the section on "pump runtimes" here:

Pump Basics - Further Reading

www.troublefreepool.com www.troublefreepool.com


Make sure she knows how to decode chlorine production dates to ensure quality. Have her observe where it is being stored.

Chlorine Date Code Decoder - Further Reading

www.troublefreepool.com www.troublefreepool.com

Breakdown of Bleach Over Time by Storage Temp - Further Reading

www.troublefreepool.com www.troublefreepool.com
Click to expand...
So what would you recommend for run times? Medium instead of high from 8-10am? I saw in that article that some run their pump on low 24/7
 

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Pas_pool said:
I did read that. Doesn’t really give guidance to a run time schedule.
Click to expand...
You should run the pump for a reason. Consider both speed and duration if you have a VS pump and automation. Reasons for running the pump can be:
  • Mix chemicals: Low speed for 1/2 hour is fine for chlorine and acid additions. Salt, calcium, and stabilizer can require more circulation at higher speeds.
  • SWG: Clean filter flow off speed + 200RPM, for whatever duration you need for the % output of the SWG.
  • Filter: Low speed is better for filtering. Filter long enough so you are happy with the water.
  • Skim: Run the lowest speed that get you sufficient skimming. Run for long enough to get the results you want.
  • Heater: Run at the speed that gives you enough flow for the heater and run for the duration you need to heat.
  • Vacuum: sufficient RPM to operate the vacuum for as long as necessary to clean satisfactorily.
Some of us with VS pumps and a SWG like to run our pump 24/7 at low speed and always add some chlorine to the water.

I think it does. Run your VSP at low speed 24/7.
Start with clean filter, slow your VSP until the SWG goes off, add 200 RPM.. Run there.
If it doesn't skim to your satisfaction, turn up the RPM for 24/7 at a speed that skims, or add a period of time that runs higher RPM and skims what you want.
If you have a heater, the RPM must be enough to provide sufficient flow for the heater.
etc.

It is all a dance.

I run 1400 RPM 24/7. If I'm heating, I run 2200 to provide flow for the heater. I have solar cover, so 1400 is plenty to skim.
 
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