• Removes sludge and reduces maintenance frequency• Effective all-natural, bacterial treatment for all freshwater aquariums• Helps to achieve and maintain a healthy aquarium environment How To Use PURE Aquarium Waste Remover:Simply add the balls directly into your aquarium• Add PURE Aquarium Waste Remover into your aquarium to rapidly and effectively break down detritus in your aquarium.• Using Waste Remover will also reduce maintenance and cleaning frequency on your filtration equipment and substrate.• When using PURE Aquarium Waste Remover for the first time add 3 balls per 50 litres of tank volume.• To be effective a new dose should be added every four weeks.• PURE Aquarium Waste Remover can be used in conjunction with other PURE products in the family. Product Information:• PURE Aquarium Waste Remover is safe for use in all freshwater aquariums.• We would always recommend the addition of oxygen into your tank using an air pump or venturi.• Because PURE Aquarium Waste Remover is a natural product it is perfectly normal that the balls may vary in size.• PURE Aquarium Waster Remover can act differently dependent on water conditions in each tank. This means that variations in appearance are normal and the rate of change can vary.• Each PURE Aquarium Waste Remover ball is manufactured from a natural polymer and is biodegradable.• Wash hands after use.• Once opened, store with lid tightly closed in a cool dark place.• Keep in a safe place out of the reach of children.