The fluoro's I've used are Gardner (mainline) and Sufix. Had a large stock of each as they keep better than mono's.
Strangely enough for combi rigs I have switched back to Amnesia as I don't think laying on the lakebed a fluoro does make that much difference anyway, being on the lakebed, mixed in the bottom detritus; and as for fluorocarbon being invisible as a mainline, it shows up pretty well, as most get covered in plankton and particles rendering the index of being in water irrelevant in most cases, plus the lack of casting ability with it...