Boyu sponge filter
The Bio sponge filter connects to your air pump and offers a large surface area for good bacteria to grow on. This assists in biologically filtering water. They are easy to use and quiet to operate.
Mini SF-100 : Diameter 5cm Height 7cm without tube - 12cm with tube.
Suitable for small tanks such as betta tanks, etc.
Small SF-101 : Diameter 7.5cm Height 9cm without tube - 19cm with tube.
Medium SF-102: Diameter 7.5cm Height 14cm without tube - 24cm with tube.