Quote Originally Posted by Michael R 1974 View Post
The only real problem I can think of would be shorter shelf life. Since it is not quite as concentrated as the stock solution is supposed to be for storage it will be less stable. How much less stable, I don't know.
Michael makes useful point. Sooner or later someone out of the many thousands of us will actually mix 6L as stock by mistake. As stock is nearly 5L of water anyway then at what point does the extra water reduce the life of the "stock" if at all?

Provided that the "stock" is dumped after every use then why can't the 6L be made into 10L of "1+1 stock" and remain safe to use for as long as stock solution lasts?

Any chemists out there with comments?