I'm in the possession of a large flash lamp pumped dye laser set up for use with R-6 dye. The water cooling and dye management loops are separate and remote to the head. Does anyone have any suggestions re. a good in line filter for the 50:50 water/methanol mix with R-6 and COT quencher that will remove a significant amount of the generated photo-degradation products, but leave the active components unaffected. As a note, activated carbon was a very bad choice as it removed all the dye in a single circulation. I'm looking for a self contained barb to barb unit or an insert that will fit an available housing.