Aquascape Sludge & Filter Cleaner Water Treatment for Pond and Water Features, 16-Ounce Bottle | 98890 Quickly cleans rocks, gravel, and filter pads Contains five pure strains of heterotrophic bacteria 1.5 billion CFU per ounce potency, ensuring consistently effective treatment Safe for fish, plants, pets, and wildlife Easy-to-use pump top; 16-ounce bottle treats 10,000 gallons of water; single dose (1 pump) treats 100 gallons