The mini aquarium sponge filter can effectively trap debris, food residue, wastes, or other impurities in the water, preventing them from entering the aquarium to keep the water clean. The built-in mini filter balls are helpful for blocking large particles in the water and accumulating beneficial elements, providing biological filtration to fully remove excess damaging substances.

The small internal filter measures 2.13" W x 2.4" H and is suitable for fish tanks up to 5 gallons, making it ideal for the breeding and feeding of various ornamental fish, shrimp, or fish fry. The detachable submersible filter requires an air pump of less than 2 W, with a jetting volume of the air stone at 0.6 L/min. The bio sponge filter with the air stone can produce a cascade of dense bubbles in the water, greatly promoting oxygen circulation to keep your fish healthy.

The bio sponge filter can be easily detached for cleaning. Rinse the sponge every 2 to 4 weeks using aquarium water ONLY. Avoid soaking or washing it in tap water! Replace the white sponge every 2-3 months.

The medium sponge filter measures 3.2" x 2.2" and is suitable for 5-20 gallon tanks. It has a maximum air flow rate of 12.5GPH (0.8 L/min) and requires an air pump of less than 4 W.

The large sponge filter measures 4.1" x 2.2" and is suitable for 20-40 gallon tanks. It has a maximum air flow rate of 20.5GPH (1.3 L/min) and requires an air pump of less than 5 W.

All three sizes of the sponge filter have received a customer review rating of 4.3 out of 5 stars based on 24 reviews.

The small sponge filter is priced at $7.99, the medium at $9.99, and the large at $12.99.

In summary, the mini aquarium sponge filters offer effective mechanical and biological filtration for various tank sizes, with easy maintenance and affordable prices. These filters help maintain a clean and healthy aquatic environment for your fish and other aquatic creatures.

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