CrystalClear Barley Extract has been proved as a powerful pond treatment, clearing water while eliminating and preventing future problems. Barley produces a natural extract while it slowly ferments or rots, CrystalClear Barley Extract eliminates the mess of adding and cleaning up the mess of adding barley to your pond. Fermented under ideal conditions to capture a powerful, all-natural extract, CrystalClear goes to work immediately out the bottle with no lag time or mess.