My 5L jug of Hypam is about gone, and my local store doesn't stock the big jugs of it anymore. I hate to mail order large quantities of rapid fixer because of shipping costs. I know somebody who has a lot of C41 fixer he might give me for free. What makes this different than B&W rapid fixer? Has anyone used this for B&W, and if so, how do you use it?

. They are basically quite the same, but maybe better safe than sorry.