Pawfly Mini Aquarium Sponge Filter for Fish Tanks up to 5-20 Gallon

The mini aquarium sponge filter can effectively trap debris, food residues, wastes or other impurities in water, preventing them from entering the aquarium to keep the water clean. This mechanical filtration system contains mini filter balls on the bottom that are helpful for blocking large particles in the water and accumulating beneficial elements, providing biological filtration to fully remove excess harmful substances.

Available in three sizes - Small, Medium, and Large - these sponge filters are suitable for 5 to 20 gallon (Small), 5 to 20 gallon (Medium), and 20 to 40 gallon (Large) fish tanks, making them ideal for the breeding and feeding of various ornamental fish, shrimp or fish fry.

Powered by an air pump, the bio sponge filters produce a cascade of dense bubbles in the water, greatly promoting oxygen circulation to keep your fish healthy. The required air pump wattages are less than 2W (Small), less than 4W (Medium), and less than 5W (Large).

The submersible filters can be easily detached for cleaning, with the sponges needing to be rinsed every 2 to 4 weeks using aquarium water only. Avoid soaking or washing the sponges in tap water, and replace the white sponge every 2-3 months.

Customer reviews for these sponge filters are consistently positive, with a 4.5 out of 5 star rating based on 20 reviews for each size. The prices for the filters are $7.99 (Small), $11.99 (Medium), and $12.99 (Large).

In terms of physical dimensions, the Small sponge filter measures 2.13 x 2.4 inches, the Medium is 3.2 x 2.2 inches, and the Large is 4.1 x 2.2 inches. The maximum air flow rates are 9.5GPH (0.6 L/min) for the Small, 12.5GPH (0.8 L/min) for the Medium, and 20.5GPH (1.3 L/min) for the Large.

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