Osaka chamber filter Alfa croc package
Alfa croc for the Osaka chamber filter and the Osaka chamber filter with vortex.
+/- 30 liter Alfa croc, very porous, ideal for bacterial housing!
Alfa croc is a sponge like and porous kind of rock which filters the water in a mechanical way. Because of the properties these rocks have they have a very large contact surface. Bacteria can attach themselves to this surface helping the rocks filter the water in a biological way. Another advantage of Alfa croc is the fact that it has a neutral pH value and is very lightweight.