- Sunsun Multi-Stage Sub Filter HW-602
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-  Good for up to about 20 gallon fish tanks
-  Dimension: 5.7" L X 5.7" W X 10" H
-  Includes filter pads.
-  Additional media can be put in space above and below filter pads
-  Capable of mechanical, biological, and chemical filtration
-  Easy installation, no messy assembly
-  Water flow regulator control amount of water flow desired depending on aquarium size
-  Suitable for freshwater and marine
-  SunSun's activated carbons, ceramic rings and bio-balls can be purchase separately