Quote Originally Posted by pentaxuser View Post
1. Water or stop bath(presumably acid) gives a grain penalty
I have never heard this claim before and also have doubts about it's veracity. I personally cannot think of any reason that it should be true. In the past, stopbaths were only needed when using developers with a high concentration of carbonate. No one uses such developers anymore. The purpose of the acidic stopbath was to prevent developer carry over from raising the pH of the fixing bath.

I have been using a plain water rinse for most films for many years without any adverse effects that I can tell. The only time that I use something else is when processing soft emulsion films like the Ekfe ones where I use a chrome alum hardner.