Fluval U2 Aquarium Internal Filter 400L/h for tanks up to 110L Medium Aquariums Includes 3 clear lenses plus

Includes 3 clear lenses plus 2 x red

making it ideal for open aquariums or terrariums

Can be used with any brand external filter

The dense material used by Aqua One in manufacture means that they will instantly sink to the bottom

Included is a waterproof probe with 3 position level sensors

Fluval U2 Aquarium Internal Filter 400L/h for tanks up to 110L Medium Aquariums Includes 3 clear lenses plusFluval U2 Aquarium Internal Filter 400L h for tanks up to 110L The Fluval U2 Underwater Filter provides complete and efficient 3 stage filtration, including BioMax biological filtering, to create superior aquarium water quality. The U2 Filter includes practical and versatile features, making it ideal for application in fresh, marine and reptile environments. The filter provides the option of setting the flow output in 3 different positions, a key