Another "Which Kit?"

[Sumo1]

We've almost got the church pool going again so I've got to get ready for my lifeguards to test the water daily. We have an old Pentair kit for which I can just get new reagents but it's the type that uses DPD tablets. I'm only familiar with drop-based testing. Is one better than the other? Thoughts, comments, anecdotes anyone??? Thanks
Hal

[aylad]

I don't have any experience with DPD testing, but my understanding from Ben was that the DPD-FAS testing does test higher levels accurately than DPD alone. Personally, I'd go with what you know works!

Janet

[waterbear]

for a DPD kit the Taylor K-2005 is pretty much the standard but as Aylad said, an FAS-DPD kit is better such as the Taylor K-2006. I have never been a fan of the Pentair kits. Lamotte makes a decent drop based DPD kit but it costs more than the Taylor and is not any better, IMHO.

[CarlD]

I have an old DPD test kit. To me, DPD is worthless. It's only advantage over OTO is you get separate FC and CC readings. But you cannot dilute it to double or triple the range the way you can with OTO.

DPD is to FAS-DPD what a horsefly is to a horse. IMHO

[waterbear]

But you cannot dilute it to double or triple the range the way you can with OTO.

Not quite true and, in fact, the Taylor K-2005 DPD kit has dilution markings on the test vial for pool water and distilled water and instructions for a 1:1 dilution and a 1:4 dilution.

[Sumo1]

After discussing kits with a man who has experience running this pool, I guess we're going with the DPD kit from BioLab. He reasoning was that DPD tablets have a longer shelf life than FAS-DPD reagents. Since I won't be running the pool and he'll be training the life guards, we'll do this one his way and I'll continue to test my way at my home pool. Thanks for your comments and advice.

Hal