B&Q - Pack Of 10 Aquarium Bio Balls Filter Media With Foam500 Balls Total Porous Biological Filtration

Pisces

Promotes oxygen gas exchange. Creates a large surface area for the 'beneficial' bacteria to colonise, increasing the break down of harmful Nitrates and Nitrites producing better quality water for your fish. Specifications Average 50 balls per pack 26mm diameter Foam insert Free net bag for easy cleaning.