How does one test for chlorine from Trichloro-S-Triazinetrione

Hi there,

I tried to post this yesterday but didn't see it appear. Here it is again, and thanks for taking the time to comment.

My search for a test that measures the chlorine generated by Trichloro-S-Triazinetrione tabs in my chlorinator lead me here. I'm told by my Leslie's guy that the Taylor Chlorine/Bromine test doesn't detect stablized chlorine from T-S-T tabs. Indeed, I tried swirling a tab in a beaker of water and came up with nil on the Taylor Cl test.

So, how am I supposed to maintain chlorine balance if I can't test for it?

Thanks for any insight.

Regards,

Michael