Pisces Aquarium Active Bio Bead Filter Media 5 x 500g (2500g Total) - Ceramic Biological Filtration Balls.

Aquarium Bio-Media - Pisces Active BioBead Media, a biological media for all types of aquarium filters Highly Porous Structure - Each bead is made of highly porous ceramic material that contains small pores that allows bacteria to grow Nitrifying Bacteria - With a quartz like material and a large surface area, the beads allow beneficial bacteria to colonise and grow so they can work hard to cleanse the aquarium water Clean and Healthy Tanks - As the bacteria works, it helps to remove harmful levels of toxins like ammonia, NH4 Nitrate, NO2 and NO3, creating a healthy environment in the fish tank Specifications - 500g bags contain beads of approx 5-10mm each. Pack of 5 x 500g (2500g total) in a fine mesh bag