BIO BALLS Media Aquarium Filters Biological Tropical Marine Sumps 0.8" 21mm x100

21mm Bio Balls Aquarium & Pond Filter Media

Premium Bio Balls - Standard 21mm

Filter media forms an essential part of any aquarium or pond filtration system. Our 21mm Bio Balls provide a large surface area for bacteria to develop, helping to break down ammonia and nitrite.

Bio Balls also help improve overall water quality by maintaining healthy oxygen and PH levels, and absorbing and breaking down poisonous ions.

Long lasting and highly effective, our Bio Balls are suitable for use in filtration systems to filter freshwater tropical and saltwater marine fish tanks and ponds.

Maintenance: Rinse thoroughly prior to use until the water runs clear. Bio balls can be rinsed and re-used numerous times. To preserve biological activity, it is advised to use aquarium water when cleaning rather than tap water.

Diameter: 21mm / 2.1cm / 0.8"
Supplied in bags of 100 balls

Plastic biological filter media with a large surface area for positive bacterial growth
Suitable for coldwater, tropical & marine tanks as well as ponds!
Simple to use - place loose or in mesh bag inside your filter
100 balls per bag - each ball is 25mm/1"