The unique filter media in the Clean Ball consists of Carbon and Zeolite which removes Nitrate and Ammonia and reduces algae growth.

• Decorative filter ball for small aquariums, ideal tool for maintaining healthy water quality
• Contains Crystal Clear Media, which absorbs dyes, nitrate and Ammonia and reduces algae growth.
• Use 1 ball per up to 25 litres of water, the Clean Ball works for 1-2 months and should be replaced after that period.