Check the listing for details. Alpha-Bio Sludge & Odor Remover 12oz. Condition: New. Listed at 29.99 USD. Sludge & odor remover BY ALPHA-BIO Sludge is the result of uneaten fish food, fish waste, dead algae, leaves and bits of other debris that have collected at the bottom of a pond or body of water. This causes not only an odor, but also a problem for bio-filters that are trying to keep the water clean. The all-natural microbes in All Season Aqua-One Dry Sludge Remover feed off of sludge and eliminate the debris. No mess is left behind and the result is a clean, healthier pond with a functional filter. An all natural concentrated treatment that specifically targets sludge removal, improves the clarity of yourpond and the health of your fish. Dry formula in easy-to-apply 2 oz. water soluble packets. Maintenance Application Rate: 10,000 gallons -- 1 pkt / 2 weeks 5,000 gallons -- 1 pkt / 4 weeks 2,500 gallons -- 1 pkt / 6 weeks1,000 gallons -- 1 pkt / 7 weeks 500 gallons -- 1 pkt / 8 weeks