20 Grams of DPD powder with measuring spoon. Mix 0.5 grams per 4oz un-chlorinated (or distilled) water for 60 refills, 6 to 12 month supply!
Recommended to use the 4oz bottle. Over time the powder turns dark, especially at higher temperatures. To use larger bottles and for higher accuracy use the liquid reagent.
Includes a 0.5 gram measuring spoon.