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Sea Star Submersible Internal Fish Tank Filter

1. Functions: performs mechanical, biological, and chemical filtration (when the appropriate media is added) to purify the water.
2. Aeration: adds oxygen directly to the tank through an air tube.
3. Design: compact, space-saving design that can be easily hidden in a corner of the tank.
4. Installation: mounts securely to the tank wall using rubber suction-cup bases.