Quote Originally Posted by CarlD View Post

There are 3 test kits that will serve your purposes. All are basically the same and it doesn't matter really which you get. All use a chlorine test called FAS-DPD, which is NOT the same as the chlorine test called DPD.

1) Taylor brand K-2006 or K-2006C from Taylortechnologies.com
Taylor makes the chems that most of the better kits use. The C has more of each chem, but costs more.

2) Leslie's Pools Online (not their retail stores)--their FAS-DPD Chlorine Service Test Kit. Leslies test kits are ALL re-branded Taylor kits.

3) Troublefreepools.com. I don't know a lot about these kits other than they are similar in concept to the kits that used to be sold at our sister site Poolsolutions.com--the PS-234 (no longer available) What I do know about TFP kits is they use FAS-DPD for chlorine testing and have a complete suite of tests as the others do.
The Troublefree Pools test kit uses all Taylor reagents, does not include the acid and base demand tests of the Taylor K-2006 but does include a Taylor K-1000 OTO/pH tester for daily checks of pH and chlorine. It also includes more CYA reagent then the Taylor kit. It basically includes all the tests that were included in the PS-234 but the reagents are all Taylor reagents (I believe that some of the reagents in the PS-234 did not come from Taylor, but from another source.)