Durability - With aesthetically appealing, clean-line designs, all ProFlex models are manufactured using extremely durable materials, and include a lifetime warranty against leaks, Quiet Filtration - As water enters the ProFlex, it flows through a revolutionary bubble diffuser chamber where bubbles are expelled, significantly reducing noise, After water flows through the bubble chamber, it flows through two 200 micron filter socks to remove large particulates, Flexibility - Transform the ProFlex into three completely different setups: a traditional wet/dry trickle filter (using the BioMedia accessory pack-sold separately), as a Berlin style, or a Refugium sump filtration system, This breakthrough design makes modifying the ProFlex a snap, It"s as easy as sliding the adjustable water height wall up or down, removing the thumb screws on a removable baffle wall, sliding in the filter pad and trickle down grid and adding bioballs, or adding accessories like a return pump and protein skimmer to the ample space in back, The ProFlex sump filtration unit comes in four sizes to accommodate any medium to large-sized aquarium up to 210 gallons, Dimensions: 12"" x 10"" x 17"", SKU: RYLHC597