Testing CYA

[Rocknoids]

I am new to my own testing and this is a BIG learning curve.
I finally figured out Free Chlorine. Now I need a bit of help with the CYA.
When I test the water, my results does not come up to the 100 mark. I round that to 150. Is that correct?

 

[mknauss]

Extended Test Kit Directions Archives

www.troublefreepool.com

If your CYA level is 90 or higher, repeat the test adjusting the procedure as follows:

1. Fill the mixing bottle to the lower mark with pool water.
2. Continue filling the mixing bottle to the upper mark with tap water.
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.
5. Continue the test normally from step 2, but multiply the final result by two.

 

[Rocknoids]

Extended Test Kit Directions Archives

www.troublefreepool.com

If your CYA level is 90 or higher, repeat the test adjusting the procedure as follows:

1. Fill the mixing bottle to the lower mark with pool water.
2. Continue filling the mixing bottle to the upper mark with tap water.
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.
5. Continue the test normally from step 2, but multiply the final result by two.

Your testing is different from what comes with the test kit. Color me confused.

 

[mknauss]

What test kit?

 

[Rocknoids]

What test kit?

The great TS-100
Mix the pool water with R-0013. Mix well, let it sit for 30 sec, then mix again. Now proceed with filling the tube.

 

[mknauss]

Right. I gave you a procedure to do the Extended CYA test when your level is over 90, as you stated.

 

[Rocknoids]

Right. I gave you a procedure to do the Extended CYA test when your level is over 90, as you stated.

OK, I will give it a try and see what happens. Thanks!

 

[Rocknoids]

Right. I gave you a procedure to do the Extended CYA test when your level is over 90, as you stated.

I tried your way and came up with still more than 100. I might round it to about 130ish.

 

[mknauss]

So it is above 200.
You need to drain/exchange the entire pool volume and start over.

 

[Rocknoids]

So it is above 200.
You need to drain/exchange the entire pool volume and start over.

That sounds a little drastic. I'll fill it with more fresh water when it evaporates. I'll let you know how it goes. Thanks for the help.

 

[mgtfp]

Good luck.

 

[RaceMX]

What is your FC? You can use the Pool Math app for recommended levels.

PoolMath

www.troublefreepool.com