New pool owner after a heavy bather load

Wendy3tkl

Member
Jun 28, 2021
20
Westminster, MD
Hi everyone! My pool has been open for about 2 weeks. Thankfully, I found this site early enough in the process that I didnt add the recommended chemicals from Leslie's. I used a few pucks before I switched to the LC, but since I was at a CYA of zero, I'm hoping it didnt do much harm.

I didnt have a test kit, but used the pool calculator with the Leslie's water test and did my best.

I had a high alkalinity (180) and have been attempting to lower that to TFP goals with dry acid, and have been slowly adding stabilizer in preparation to SLAM.
We had a last minute cookout and ended up with a VERY heavy bather load, which resulted in zero chlorine and cloudy water the next day. (yesterday.) Up until then it had been crystal clear. :( I know for next time, I should bump up the FC beforehand.

I finally got my test kit yesterday and would love some advice on how to proceed from here.

Last night's numbers:
FC 3
TC 3
PH 7.6
CYA <30(I couldn't make the dot disappear all the way) Leslie's water test had CYA at 37.

I used pool math and added 22 oz of LC. I didnt add any stabilizer bc I wasnt sure of my CYA number.

This morning's numbers:
FC 5
TC 5
CC 0
PH 7.6
CYA 34 (That's when I had to work hard to see the dot. I'm not sure how to read this test.)
TA 90? (Does hot pink count as red?)

What should I do next?

Thank you all so much! This site is a goldmine of knowledge, and I recommend it to everyone I know that has a pool. :)
 
Last edited:

Cwiggs

Gold Supporter
Aug 31, 2019
285
Phoenix, AZ
Pool Size
21000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-60 Plus
Welcome to TFP!

If you are working that hard to see the dot your CYA is below 30. You should add CYA in asap to get it up. As you add CYA you can re-do the test and you'll be able to see the progress where the dot is becoming less visible at 30.

Is your CC really 5, how did you test that? CC of 5 isn't good, is that why you are thinking of SLAMing? How does the water look?

Hot pink for TA sounds correct, you can put more drops in to see if the color changes, if it doesn't change that is what your TA is at. I'd focus on the CYA before you focus on anything else, and TA of 90 isn't bad.

Also have you read the ABCs of Pool Water Chemistry? If not give it a read.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
26,250
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
For CYA we round up. If the dot disappears between 40 and 30 you call it 40. Don’t overthink it.


Keep your FC above the recommended level by 1-2ppm.

 
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Wendy3tkl

Member
Jun 28, 2021
20
Westminster, MD
Welcome to TFP!

If you are working that hard to see the dot your CYA is below 30. You should add CYA in asap to get it up. As you add CYA you can re-do the test and you'll be able to see the progress where the dot is becoming less visible at 30.

Is your CC really 5, how did you test that? CC of 5 isn't good, is that why you are thinking of SLAMing? How does the water look?

Hot pink for TA sounds correct, you can put more drops in to see if the color changes, if it doesn't change that is what your TA is at. I'd focus on the CYA before you focus on anything else, and TA of 90 isn't bad.

Also have you read the ABCs of Pool Water Chemistry? If not give it a read.

Welcome to TFP!

If you are working that hard to see the dot your CYA is below 30. You should add CYA in asap to get it up. As you add CYA you can re-do the test and you'll be able to see the progress where the dot is becoming less visible at 30.

Is your CC really 5, how did you test that? CC of 5 isn't good, is that why you are thinking of SLAMing? How does the water look?

Hot pink for TA sounds correct, you can put more drops in to see if the color changes, if it doesn't change that is what your TA is at. I'd focus on the CYA before you focus on anything else, and TA of 90 isn't bad.

Also have you read the ABCs of Pool Water Chemistry? If not give it a read.
Ugh, I wrote it wrong. My CC is zero. I got that number by subtracting FC from TC. I think I switched the number when typing. I will go and fix. The water was cloudy after the party, and since there was zero chlorine the next day, thought I should SLAM.

I have read the ABC's of Pool care a few times. I suffered a recent head injury and I am having trouble retaining new information right now. Very annoying. Lol
 

Wendy3tkl

Member
Jun 28, 2021
20
Westminster, MD
For CYA we round up. If the dot disappears between 40 and 30 you call it 40. Don’t overthink it.


Keep your FC above the recommended level by 1-2ppm.

So then I don't need to add any stabilizer then? Do you think I should SLAM?
 

Wendy3tkl

Member
Jun 28, 2021
20
Westminster, MD
For CYA we round up. If the dot disappears between 40 and 30 you call it 40. Don’t overthink it.


Keep your FC above the recommended level by 1-2ppm.

That CYA test link was so helpful, thank you!
 

markayash

Gold Supporter
Mar 21, 2016
3,269
Atlanta Ga
Probably not a bad idea since the water did get cloudy. I have a SWG but keep a gallon of liquid around just in case I get a lot of swimmer. That way you can add a 1/2 gallon ( or what ever suites your pool ) that night
Also as you get use to it you will
Learn when the water just looks differnet
 
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revitup

Gold Supporter
Bronze Supporter
Nov 30, 2019
546
Pawleys Island, SC
Pool Size
8500
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
I think I will. I bought 8 gallons of liquid chlorine. And if I dont need stabilizer, I guess I'm ready to go!
Don’t forget to get PH to 7.2 - 7.5 for the SLAM.
 

Wendy3tkl

Member
Jun 28, 2021
20
Westminster, MD
Probably not a bad idea since the water did get cloudy. I have a SWG but keep a gallon of liquid around just in case I get a lot of swimmer. That way you can add a 1/2 gallon ( or what ever suites your pool ) that night
Also as you get use to it you will
Learn when the water just looks differnet
So, before heavy swimming is that when I should raise the FC by 1-2 ppm?
I'm getting ready to SLAM now. I just need to reread the info first.
 

markayash

Gold Supporter
Mar 21, 2016
3,269
Atlanta Ga
If your FC is good ( could add a little before and get it up slightly ) I like to add after. That way I don’t have to worry about getting it too high with them swimming :)
A lot of times in my pool it gets cloudy from the kids stirring up dust from the bottom :)
 

Wendy3tkl

Member
Jun 28, 2021
20
Westminster, MD
If your FC is good ( could add a little before and get it up slightly ) I like to add after. That way I don’t have to worry about getting it too high with them swimming :)
A lot of times in my pool it gets cloudy from the kids stirring up dust from the bottom :)
That makes sense. Raise it just a little and adjust after. I do want them to be comfortable swimming.
 
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markayash

Gold Supporter
Mar 21, 2016
3,269
Atlanta Ga
My test kit doesn't have the needed test. I'll have to get one, but I need to wait until my next pay period. I thought perhaps it was necessary bc it was a new pool. Is there supposed to be an initial SLAM?
Click the link on the test. Basically your testing your FC at dark and again in the morning to see how much you lose over night.
 

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