Pure Aquarium 25 Ball

Regular use of PURE Aquarium will ensure that your fish live in a safe, healthy and crystal clear environment. We recommend that you use PURE Aquarium as part of your regular maintenance programme. You cannot overdose with PURE Aquarium.

• To maintain crystal clear, healthy water add 1 or 2 PURE Aquarium balls per 25 litres of water once a week. Add the balls directly into your aquarium filter, ideally held in a filter bag.

• If using PURE Aquarium for the first time or if your aquarium has clarity problems, add 5 to 10 balls per 100 litres of water. When water clears, continue to use as described above.


PURE Aquarium is a live bacteria and enzymes in a unique gel ball delivery method.

Bacteria are suspended in the ball until placed into aquarium water. When fish go in, ammonia is produced, and the bacteria leave the ball to feed on the fish waste. The ball shrinks and the bacteria coat the substrate, decoration and filter media. Other bacteria are also contained in Pure which clear water, and help reduce organic waste.

Ideally, place Pure Aquarium inside the filter, in an area that will contain it. You may need to use a filter bag to keep it in one place. Areas of water flow are best, and if you have to, you can drop Pure Aquarium straight into an aquarium containing small fish. Large fish over 15cm may try to eat it, which should be discouraged.