I'm now using the Formulary's TF 5 fixer for my prints (fiber paper). It says to wash them 15-25 minutes after a one minute fix. I tone my prints for a bit in KRST. Do I now follow the directions on the Kodak bottle for washing prints or continue the original schedule for washing?

The Kodak product says to fix twice, which I no longer do since I started using TF 5. Should I be using a wash aid? If so is this something I can mix up in house? I don't mind buying chemicals etc. but the cost of shipping is a real bite in the wallet.