Adding beneficial pond bacteria to your pond not only helps breaks down muck and dead vegetation on the pond floor, it also helps neutralize nitrates and phosphates, two things that can feed the growth of unwanted weeds and algae. The liquid pond bacteria product, Natural Pond Cleaner, will help keep your pond clear of muck and sludge. The Natural Pond Cleaner consists of safe and natural bacteria that helps maintain pond muck levels, dead leaves, odors and other organic material that can hurt the healthy balance of your pond or lake. | Crystal Blue Natural Pond Cleaner