B&Q - Aquarium Bio Balls Filter Media With Foam50 Balls 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 cleaningIndividual Pack Size: L17 x W12 x D6cm.