Both are new and haven't seen water.
Ocean Clear 375 Filter w/UV - 25 micron cartridge and 18W AquaUV sterilizer. $225
Ocean Clear Model 317 - triple micron filter: 3 densities of polystrand media from a 100 micron pad at the top to a 50 micron section at the bottom. $125
Ocean Clear 375 Filter w/UV - 25 micron cartridge and 18W AquaUV sterilizer. $225
Ocean Clear Model 317 - triple micron filter: 3 densities of polystrand media from a 100 micron pad at the top to a 50 micron section at the bottom. $125