ELITE Mini Underwater filter is designed specifically for small aquarium up to 3 U.S. gal (11 L). It's compact size makes the filter easy to conceal in any setting. The ELITE Mini comes complete with a foam filter insert, ideal for mechanical and biological filtration.
The ELITE Mini underwater filter features a venturi with valve, when added aeration is desired. As well the filter is equipped with an adjustable output diverter and flow control these two functions gives you the flexibility of diverting the water flow into various locations and at the same time regulate the output volume.
The elite mini filter is great for 5-10 gallon tanks due to the high current. It's also a super good Co2 diffuser and if you use it on the highest setting in a 10 gallon tank, it works wonders. The sponge filter's a little weak though, but you can just rinse it every time other than buying cartridges. Other than that, this is a great buy!