Internal filter in a compact complete mechanical and biological filtration.
Ideal multi-function internal filter for aquariums up to 30L.
Works with l 'aid of an air pump (air stone included in the filter)
Size: cm8x8x8, 5
1 - flow 'air
2 - flow 'water
3 - filter sponge (biological filtration)
4 - activated carbon (chemical filtration)
5 - sand (mechanical filtration)