Evolution Aqua PURE Aquarium Waste Remover is a specially formulated bacterial treatment, all-natural, for freshwater aquariums. Every ball contains a high-concentration of live bacteria and enzymes. Once added to your aquarium, the blend of beneficial bacteria and enzymes inside each ball will rapidly break down and remove the sludge in your aquarium. The innovative biodegradable gel ball delivery method provides an easy way to dose your aquarium. Regular use of PURE Aquarium products will ensure that your fish live in a safe, healthy and crystal clear 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.- For ongoing protection add 1 ball per 50 litres of tank volume per month, or as required.- 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.