Fluval U1 Underwater Filter 3.8" length x 5.2" width x 6.5" heig

The Fluval U1 Underwater Filter is ideal for use in all aquatic or reptile environments. You can use the Fluval U1 Underwater Filter as your primary filter in smaller aquariums or as a supplementary filter for larger or heavily occupied aquariums. The Fluval U1 Underwater Filter is also great for tanks with low water levels. The Fluval U1 Underwater Filter was specifically designed for use in your Fluval U1 Underwater Filter.