Attachable additional filter for Nano corner filter and Nano corner filter XL

Especially recommended for fish stocking. Increases the filter performance or can be used for short-term additional filtration with phosphate binder or activated carbon. Clips onto the Nano corner filter (also XL) like a backpack. Filter volume cannot be replaced by anything – except filter volume.

Tip: Filled with Soil, the hardness is lowered and humic substances are released into the water.