Microbe-Lift Barley Straw Pellets Improves water quality and fish and plant health.Formulated for natural pond bio-augmentation.This is a 100% pure, natural product consisting of concentrated barley straw enriched with peatand humic acid. Humic acid softens pond water, reducesthe negative effect of phosphate andgenerally improves the environment for fish. Thesepellets are easier to apply, result in less mess and work faster than barley straw bales.