Taylor Test Kit for measuring FC: DPD vs. FAS-DPD?

DaciaT

Member
Jun 17, 2019
10
Breaux Bridge, LA
Shopping for Taylor kits to measure FC. I'm not interested in buying a complete kit, I'm satisfied with my HTH 6-Way...I just need to test for FC.

K-1515-A, which is strictly for measuring FAS-DPD, for about $25, is backordered on Amazon. I found K-1004 "Troubleshooter DPD Test Kit", about same price point, says it measures FC, but it doesn't say FAS-DPD, it only says DPD.

Can someone explain the difference and advise if I'm better off waiting 4-5 extra days for K-1515-A? In the meantime, I'm not sure if my little pool has enough FC and I'm obsessing over it a little bit.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
20,356
Laughlin, NV
You want a FAS-DPD test kit. It measures FC and CC and can reliably test FC to 50 ppm.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
42,991
Tucson, AZ
Order the FAS-DPD from tftestkits. Likely get it before it is off backorder and it will probably be fresher.

You do not want the DPD pink color matching.
 
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Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,053
San Dimas, CA (LA County)
DPD uses colormatching, which is fine as far as it goes. Which is usually only to 5, although I have heard some go to 10. Still not high enough for us. And what if it's higher -- much higher? It bleaches out. So you may read 25 as 3 and react accordingly and make a problem worse. And how can you tell if it's low or bleached-out? You don't.

FAS-DPD can measure up to 50 FC. That's well above anything you're ever going to need. If you ever need to measure that high, you've got bigger problems than any test kit can fix.
 
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DaciaT

Member
Jun 17, 2019
10
Breaux Bridge, LA
You want a FAS-DPD test kit. It measures FC and CC and can reliably test FC to 50 ppm.
Hi Marty,
Thank you for your time and patience with me this morning in answering all my questions. I ordered the test kit you recommended from the link you provided.
 
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