Quote Originally Posted by dorff View Post
My question is: If the bleach needs bromide to work,
I don't think that assumption is correct. It's more likely a pH change. You could test by mixing the bleach part with some acetic acid maybe.

Even if you're stuck with powder kits, you should be able to mix up small quantities of blix and use it to capacity with no risk of degradation on the shelf - same as you can with the Tetenal liquid E6 kit. The powders should keep well.