22 grams potassium permanganate crystals equals how many teaspoons (or fractions of teaspoon)?..How many ounces is 22 grams of potassium permanganate...

22 grams potassium permanganate crystals equals how many teaspoons (or fractions of teaspoon)?..How many ounces is 22 grams of potassium permanganate crystals?I need to mix 22 grams of potassium Permanganate crystals with 1.75 ounces of water-then put two drops of the solution in 1 litre of the well water I am treating. If the litre of water stays pink, I can remove the iron from the well water with FILOX media (manganese oxide) without any oxidizer pretreatment