Chlorine comparator block

[BrantlyJ]

Does anyone use this? The block looks like one shade of yellow

I have had all sorts of chlorine levels from 1-10 and it all looks like the same shade of yellow to me. I have even shown it to several family and friends and it’s not just me.
I have the TF-pro kit and just been using the more advanced FC test every other day.
Anyone have a easier way to test? Thinking I might go back to strips as a daily test.

 

[cowboycasey]

That comparator is only used for PH... The DPD drop test is used for chlorine, even if you test every day...

 

[mknauss]

The OTO TC test is very useful. If you get an odd FAS-DPD result, say 0 FC, use the OTO to see if there is any chlorine in the water.

As you get to know your pool, you can use the OTO for a quick check. I use it. As long as the yellow is dark yellow/orange above the 5 ppm level, all is good.

 

[Mike1162]

Looks like you have a defective block.