Fluval U1 Underwater Filter Filters & Inserts New spectrum

New spectrum

Easy-to-read temperature settings

bluestem™ Water Additive comes in three different flavors and is one of the easiest products to use

Riboflavin Supplement

Calcium Iodate

Fluval U1 Underwater Filter Filters & Inserts New spectrumOffering outstanding 3 stage filtration, increased water movement and vital aeration, Fluval U Series internal filters are the perfect solution where external filtration is not possible. New Easy Grip Water Control Paddle New Redesigned Media Cartridge Traps more debris Designed for aquariums up to 55 L (15 US Gal) Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums Position horizontally for shallow tanks,