Keep your fish tank pristine with Aqueon AquaPacs Sludge Remover. These convenient balls effectively break down sludge, debris, and waste, converting them into harmless byproducts that can easily be removed through filtration, water changes, or gravel vacuuming. With a measureless formula, AquaPacs Sludge Remover is safe and easy to use, treating up to ten gallons of water per ball with no risk of overdosing. Spend less time on aquarium maintenance and enjoy cleaner water and a healthier environment for your fish with AquaPacs Sludge Remover. No measuring. No overdosing. No hassle. One ball treats up to 10G of water.