Condy's Crystals are crystals composed of potassium, manganese, and oxygen. They are named after Henry Condy, a Victorian chemist who was the first to use them for water purification.

Condy's Crystals turn the clear solution a purplish-pink. The color gradually fades as the crystals do their job of oxidizing any organic material (e.g. microbes) in the solution.

If the color has faded and a precipitate has formed in the solution, just shake the bottle and continue use. The effectiveness of the essence is unaffected by the color change.