Leon mentioned a while back that Ilford Hypam is a decent fixer for Pyrocat processing. When I bought the Hypam, I went ahead and bought the fix hardener solution, too. I'm not sure if I need to use it, though. Has anyone used that combo before? Do I need the hardener? I'm going to develop 120 film (tmax 400, ilford delta 400) if that makes a difference.