Aqua One Bioballs are plastic spheres with a special hollow construction and high surface area which encourage the growth of aerobic filtration bacteria which are essential to any aquarium's health.
The Balls are very light and often 'tumble' gently in the external filter's canister, this helps to scrub off debris and prolong effective working life between clean outs. Aqua One Bioballs work well in any filter but are orginally designed to work with the Aqua One Canister Filters and Advance Series Canister Filters
Please note this is an order in product. Allow approx 1 week for dispatch