The U series is a benchmark in internal filtration with a three-stage filtration and easy replacement cartridges by a flip-flop lid.
Stage 1 removes large particles; stage 2 poly/carbon traps fine debris and improves water clarity; stage 3 biome provides optimal biological filtration efficiency.
The filter also boasts a three-way flow system that allows you to choose where the flow comes from - top or bottom - or you can have a integrated spray bar in the middle of the filter.