Fluval U3 Underwater Filter Probes & Accessories Cultured by Reef Nutrition using

Cultured by Reef Nutrition using a biosecure process

Does not contain nitrates

and test top off operation before relying on unattended operation

500 to 800 micron copepods for fish and coral feeding

Recommended for aquariums up to 30 gallons according to common Aqueon sizing guidance

Fluval U3 Underwater Filter Probes & Accessories Cultured by Reef Nutrition usingFluval 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.