B&Q - Pack Of 3 Aquarium Bio Balls Filter Media With Foam150 Balls Total Porous Biological Filtration

Pisces

Pack of 3 - 50 Pack Bio Balls - 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 quallity water for your fish. Highly porous, biological media for all types of aquarium filter.