High CYA - Best approach?

[Richtx24]

I have been getting high CYA for a few months on my pool water testing. My current CYA is at around 111 ppm but all other chemicals are within the correct ranges.
I think I found the cuprit about 1 month ago (chlorine tabs) and switched to adding liquid chlorine instead but the CYA level is still not going down.

After doing some research online, I am leaning towards adding water via hose to the bottom of the pool and have water flow out the top by my auto leveler.
If I do about 1 hour daily, I think eventually the CYA level might go down to the proper level while I just adjust the others.
Does this sound like a good approach and if not could anyone recommend a better solution to my situation?

As an alternative (and easier solution) I was also thinking to maybe just ride through the winter with liquid chlorine and see how that goes.

Any thoughts are appreciated!

Regards,
Rich

 

[ajw22]

How are you measuring CYA of 111 ppm?

What test kit do you have?

You have sort of described our No Drain Water Exchage . But doing it for an hour a day will take much more time and water then doing it once. You want to dump the high CYA water and replace it with 0 CYA water with minimal mixing.

How do you intend to chlorinate the pool in the summer once you lower the CYA?

 

[Richtx24]

Thanks for the quick reply. I've been using a Taylor K-2006C test kit.
That kit gave me a 100+ measure (only goes up to 100) as usual, then I took the sample to Leslie's and they gave me the 111 ppm count.
Thanks for linking the process! I guess I'll increase the rate on this case until my CYA levels get to 30-50 ppm.
In the summer I intend to use a mix of liquid chlorine and add a tablet or two if CYA lowers so help bring that up a bit. Any other suggestions for that situation?

 

[ajw22]

That kit gave me a 100+ measure (only goes up to 100) as usual, then I took the sample to Leslie's and they gave me the 111 ppm count.

Did Leslie tell you that their system maxes out around 100ppm? Nah, they don’t.

CYA > 90 dilution Test​

For CYA > 90ppm, repeat the test, adjusting the procedure as follows:

1. Fill the mixing bottle with pool water to the lower mark (15 ml line).
2. Continue filling the mixing bottle with tap water to the upper mark (30 ml line).
3. Shake briefly to mix.
4. Pour off half of the contents of the mixing bottle so it is again filled to the lower mark (15 ml line).
5. Continue the test normally by adding R-0013, but multiply the final result by two.

If you need to dilute the pool water further, then apply these ratios:

Pool water	Tap or distilled water	Multiply result by
1	1	2
1	2	3
1	4	5

Note that when doing a diluted test, you multiply the range of the test and the error rate of the test, so the results are a ballpark—not an absolute.

See CYA Testing for tips on how to read the test results.

Thanks for linking the process! I guess I'll increase the rate on this case until my CYA levels get to 30-50 ppm.

You can’t test CYA during the process. Do the dilution test to get a good ballpark of your CYA. Then you can calculate how long the dilution should run before you stop, mix, and test.

In the summer I intend to use a mix of liquid chlorine and add a tablet or two if CYA lowers so help bring that up a bit. Any other suggestions for that situation?

Get a SWG.

SWG How It Works - Further Reading

www.troublefreepool.com

 

[Richtx24]

Really appreciate the info and recommendation! I will follow through with that to adjust my CYA level.
Will definitely consider SWG for the future.