Corner Box Filter, Medium

Corner Box Filter, MediumDimensions:Width: 3.1″Height: 4″Multi-layer Fine Sponge: Provide mechanical and biological filtration and trap debris or wastes without sucking up your fish. Keep fish tanks crystal clear and healthy.Further Cleaning: The bottom gravels absorb excess damaging substances and release trace elements. And the ceramic rings can cultivate beneficial substances. Always keep water fresh.For 30 Gal Tanks: Measure 3.1″ R x 3.3″ H. Fit for 10-30 gallon fish tanks. You can change the sponge sequence at will and customize the filter materials according to the breeding density of the fish.Quiet Aeration: Air powered and cause no disturbance to your daily life. The outlet tubing is freely adjustable in height and the duck-billed outlet port brings more bubbles to promote oxygen circulation.Easy to Clean: The filter can be easily detached for cleaning. Rinse the sponges every 2 to 4 weeks with aquarium water ONLY. Avoid soaking or washing them in tap water! Replace the white sponge every 2-3 months!