Fluval U3 Underwater Filter Pumps & Plumbing 2 in a 24-hour period

2 in a 24-hour period

Can be used as part of a broader reef nutrition program without replacing proper water chemistry management

Suggested optimal flow: 120-140 gph

Complete 1/2 inch slip bulkhead fitting kit

Fluval U3 Underwater Filter Pumps & Plumbing 2 in a 24-hour periodFluval U3 Underwater Filter The Fluval U3 Underwater Filter is an internal aquarium filter for aquariums up to 40 US gallons 150 L, offering 3 stage filtration, adjustable flow direction, and in tank water movement for freshwater, saltwater, or compatible reptile setups. Internal Filtration for Medium Aquariums The U3 is designed for aquariums that need more internal filtration capacity than the U2 while still keeping setup simple and self contained.