Sorry to hijack this thread, but I have a question about Campden too. In an attempt to save a little time I'd like to start heating my mash/sparge water while it's filtering into my HLT. Can I add the Campden to the heated water and still have it work? or should I just have a second cup of coffee during the few extra minutes I'll add by waiting to heat the full amount of water?
Thanks.
MArio