Healthy Ponds Aquasphere Pro Biodegradable Pond Treatment 3-Pack, Each Sphere Treats up to 1,000 Gallons

Natural bacteria and enzyme blend reduces excess nutrients and sludge resulting in improved water quality and clarity Each sphere treats up to 1,000-gallon Provides 24/7 water conditioning for 30-day Ideal for stock tanks, koi ponds and small ponds Safe for humans, pets, fish, birds and plantsYou may also like pond boss Heron Pond Spitter - Green.