Cappy has a new pool and needs help

[stretchphoto]

Hi, all.

A buddy of mine just bought a home w a pool. He is in the process of getting a TFT test kit and learning the ropes. He’s never had a pool before.

He just went to the pool store (Leslie’s) and came back w the results attached.

I created a pool for him using my PoolMath app until, as I said above, he gets his kit and joins the conversation here.

Seems to me the first thing he needs to do is get that FC number up w some bleach, yes?

Or does he need to get the CYA number down first?

One thing I’m curious about is why Leslie’s report gives the ideal FC as 1-4 while PoolMath gives 11-18.

@PoolStored ?

Thanks so much!

 

[PoolStored]

Seems to me the first thing he needs to do is get that FC number up w some bleach, yes?

Add 5ppm per day of liquid chlorine per day until the test kit arrives. NOTHING else.

Or does he need to get the CYA number down first?

Wait for the test kit, then do a diluted CYA to confirm actual CYA.

If it is 150, then he need to replace 2/3ds of the water to get to CYA 50.
If it is 100, then he needs to replace 1/2.
Make sense?

Read no drain water exchange here...

Draining - Further Reading

www.troublefreepool.com

One thing I’m curious about is why Leslie’s report gives the ideal FC as 1-4 while PoolMath gives 11-18.

Link-->FC/CYA Levels

 

[stretchphoto]

Add 5ppm per day of liquid chlorine per day until the test kit arrives. NOTHING else.

Wait for the test kit, then do a diluted CYA to confirm actual CYA.

If it is 150, then he need to replace 2/3ds of the water to get to CYA 50.
If it is 100, then he needs to replace 1/2.
Make sense?

Read no drain water exchange here...

Draining - Further Reading

www.troublefreepool.com

Link-->FC/CYA Levels

THANK YOU!!!

 

[stretchphoto]

One other issue.

The former owner told him that the pool is “between 22000 and 25000 gallons.”

How could he narrow this down to something more accurate.

Thanks.

 

[PoolStored]

When you get your test kit, test FC. Make an addition that you expect, pump running. Test 15 and 30 minutes later. If you get a higher FC, reduce the size of the pool in PMath by 500G. If you get less than you expect, raise the size by 500G. Rinse and repeat until your addition matches your expectations.

 

[proavia]

If the pH and TA on that report are anywhere near accurate, the TA and pH needs to be addressed soon as well.
Is this a vinyl lined pool?

 

[PoolStored]

If that TA number is to be believed (which I don't, pH would be lower), he should have 16lbs of baking soda and 6lbs of Borax Mule Team 20 ON HAND. DO NOT ADD IT NOW!!!

Do the TA test, then use baking soda to raise TA TO 60...don't add 60. Use Pmath to figure how much should be added to RAISE TA from HIS test result to 60. Add that first. Wait 30 minutes with pump on and retest pH and TA. If TA is then above 50, and pH is still below 7., raise pH with Borax to 7.2

Again nothing but LC until you get the test kit.

 

[Newdude]

It will be neat to see what the test kit says.


You can run 1 test for them with your own kit in the meantime to get us started.

 

[PoolStored]

You can run 1 test for them with your own kit in the meantime to get us started.

Duh...

 

[stretchphoto]

When you get your test kit, test FC. Make an addition that you expect, pump running. Test 15 and 30 minutes later. If you get a higher FC, reduce the size of the pool in PMath by 500G. If you get less than you expect, raise the size by 500G. Rinse and repeat until your addition matches your expectations.

When you get your test kit, test FC. Make an addition that you expect, pump running. Test 15 and 30 minutes later. If you get a higher FC, reduce the size of the pool in PMath by 500G. If you get less than you expect, raise the size by 500G. Rinse and repeat until your addition matches your expectations.

Dude, you at *so* *good*.

Thanks.

 

[stretchphoto]

If the pH and TA on that report are anywhere near accurate, the TA and pH needs to be addressed soon as well.
Is this a vinyl lined pool?

Yes it is.

 

[stretchphoto]

It will be neat to see what the test kit says.


You can run 1 test for them with your own kit in the meantime to get us started.

I’m in Illinois. He’s on the east coast.

 

[PoolStored]

Dude, you at *so* *good*.

When adjusting the pool size, do the FC addition when you need to, not one after the other in succession...

 

[Acap914]

If the pH and TA on that report are anywhere near accurate, the TA and pH needs to be addressed soon as well.
Is this a vinyl lined pool?

Yes it is vinyl lined

 

[PoolStored]

@Acap914

You made it! Welcome to TFP!!!

 

[stretchphoto]

@Acap914

You made it! Welcome to TFP!!!

Welcome Cappies! @Acap914

 

[CreedenceTapes]

One thing I’m curious about is why Leslie’s report gives the ideal FC as 1-4 while PoolMath gives 11-18.

They don't take the cyanuric acid level into account, which is a gross oversight.

Cyanuric acid and the active form of chlorine establish an equilibrium. Too much cyanuric acid overwhelms too little chlorine. Hence, higher cyanuric acid levels require more chlorine in the pool to have enough active chlorine to keep the nasties in check.

When people talk about "chlorine lock" they're really talking about having too much cyanuric acid for the FC that they're running.

Go with the PoolMath recommendations.

 

[stretchphoto]

They don't take the cyanuric acid level into account, which is a gross oversight.

Cyanuric acid and the active form of chlorine establish an equilibrium. Too much cyanuric acid overwhelms too little chlorine. Hence, higher cyanuric acid levels require more chlorine in the pool to have enough active chlorine to keep the nasties in check.

When people talk about "chlorine lock" they're really talking about having too much cyanuric acid for the FC that they're running.

Makes sense. At least the chemistry. Can’t imagine why they’d not take the cya into account when computing FC.

 

[Newdude]

Can’t imagine why they’d not take the cya into account when computing FC.

And ruin the cash cow when folks follow their directions ? *sigh*

 

[Acap914]

@Acap914

You made it! Welcome to TFP!!!

So we got the water tested at an independent pool store and the results look like a different pool....

Our test kit is scheduled to arrive in the mail on Thursday.