50pcs 1″ Bio Balls for Aquarium Fish Tank Pond Filter Media in Bag

Clarify your water naturally and cultivate beneficial bacteria with these Polypropylene Bio-balls.

They promote gas exchange and increase dissolved oxygen levels, then filter the water as the bio-balls combine with organic waste to dissolve it.

For use in fresh & saltwater aquarium. Great for nano tanks.

The bio-sponge inside provide more surface area for growth of beneficial Bio-Spira bacteria.

BIO-Balls do not require replacement unless damaged or destroyed.

Diameter of bio ball: approx 1 inch(2.5cm)