Quote Originally Posted by MattKing View Post
PE has posted on this a number of times.

Fixers, including alkaline fixers, are designed assuming that acid stop-bath will be used.

Stop-bath is cheap, and the indicator is the best and most effective tool I know for keeping track of when it's time to refresh or replace my (printing) chemistry.

If my stop-bath is exhausted, I know at the least it is time to check the fixer too.

Matt
What he said.

Steve