CH test help

[talsayon]

Hello, new member here! What a great website. We just bought a house with a pool 4 months ago and I'm diving in head first. I've got the YF100 kit and speedstir and want to make sure I'm taking note of the right levels. I followed the directions as instructed but my question is, am I supposed to stop at the first hint of blue or should it be completely blue? I was between 8 and 10 drops and snapped the attached picture.

Thanks

-Calvin

 

[Texas Splash]

completely blue?

More like a total light baby blue. The purple in your pic isn't far enough.

Welcome to TFP!

 

[talsayon]

More like a total light baby blue. The purple in your pic isn't far enough.

Welcome to TFP!

Very helpful, I'll do it again and see if I can get it right this time. Thanks!

 

[proavia]

For TA and CH, continue adding drops one at a time until the color no longer changes. Subtract the last drop that doesn't change the color any further. So, if drop 10 continued to change the color and drop 11 doesn't change the color, it took 10 drops to complete the test. Then just calculate the result based on the test you did and the sample size.