RX-U 2.5 universal filter (2.5 liters capacity) Rx-U+ Series Fluidized Media Reactors by Vertex Aquaristik™ Crystal clear displays are always the goal of any aspiring Reef Hobbyist. As mainstays of the hobby, Activated Carbons and Phosphate Absorbing Medias go a long way towards the fulfillment of this goal by absorbing many of the impurities that...