I have been developing my own C-41 for a couple years using the Tetenal-Jobo "press kits", and invariably, if I use the stabilizer, mixed as directed, I end up with white crap all over the negatives. This is regardless of using or not using photo-flo in the stabilizer mix. There must be some trick to using it successfully that I am unaware of. Lately, I have been mixing the stabilizer up as directed, but add only a splash of it to a regular photo-flo rinse at the end. That's the best I've come up with. Time will tell, if I have done enough. But I'll be dead.