The dry bacteria formula digests organic waste and nutrients that feed unsightly algae in a natural pond. We recommend using the NatureMAX on a weekly basis for best results. The bacteria will maintain water clarity naturally and reduce the need for CleanMAX. The NatureMAX Powdered Pond Bacteria comes in the sizes 1 lb. and 2.5 lb. It can cover volume of approximately 16 oz. and 32 oz. It also has an application rate of 8000 gal. and 20000 gal.