I read on the forum that the FAS/DPD testing was the preferred method for testing the water. I bought a testkit from Leslies last month. I also get the water tested at Leslies until I get a comfort level with my testing. They use the OTO method. Does anyone know the differences? Disadvantages? What does it stand for?
Probably one disadvantage that I see with using the DPD method is the cost of the reagent R-0870. Does anyone know of any other place that is less expensive? Thanks in advance,