Quote Originally Posted by BobNewYork View Post
I tend to buy mini-lab C-41 fixer and use that. The container just lists ammonium thiosulphate - shouldn't be a problem; should it?

Not a problem Bob. I've been using Kodak's Flexicolor fixer for C-41 for a couple of years now. Works great and it's fast, as you know. PH is close to neutral, about 6.5 at working strength.