Fluval U1 Underwater Filter - the new internal power filter from Hagen.
For aquariums up to 55 L (12 UK gallons)
Top access - for easy maintenance
Adjustable flow control
Fluval U1 Underwater Filter is ideal for use in all aquarium or reptile environments. Use the underwater filter as a primary filter in smaller aquariums or as a supplementary filter for larger aquariums. Also great for tanks with low water levels, Fluval U1 Underwater Filter will run efficiently in a horizontal or vertical position.