SuperFish Aqua-Flow 50

Biological internal aquarium filter The perfect filter for tropical and coldwater aquariums The Easy Clean click system makes filter cleaning easy, you can replace the filter cartridge in a snap. The DualAction filter cartridge consists of filter foam with a fully open-structure for perfect filtering and Activated Carbon to remove organic contamination, chemicals and dyes from the water. For best results, replace the cartridge once a month.