Hey @wireform - Here are the steps I followed.Tell us step by step how you tested
- Grabbed 10ml of water from the pool from about a foot below the surface
- Put the tube on the SpeedStir and dropped the magnetic spinner thing in there and turned it on.
- Put in one spoon of the DPD powder. The spoon that comes with the kit. The sample turns dark pink.
- While the sample is still spinning, start adding and counting drop by drop of the R-0871
- Multiply the number of drops by .5