Quote Originally Posted by duraleigh
Well, that's pretty darn close. Actually, the FAS/DPD test measures FC first and, in a second step, measures CC's. Adding the results of the two gives TC.
That is true for FAS-DPD but a DPD test first measures FC then measured TC and you substact the FC from the TC for the CC!
I have no idea how I would effectively manage my water without Ben's kit.....he might have to do one of those "priceless" commercials.
So many test kits....so little time for testing!