I picked up Ilfosol 3 about 3-4 months back and have used it with Neopan 100 and like the combination so far. I see no point in going back to my usual 5L quantities of Xtol. The Xtol would go bad as my usage is low so I started keeping a Qt in the refrigerator but it was precipitating out of solution and Ilfosol doesn't. If you keep with Ilfosol order 3 small 12oz brown bottles next time around. Two will be full and the third you can work out of.