> Forte seems to call for only 30 minutes. Has anybody tried both?
I have used Forte quite a bit as it's the one I can get locally (MP1 chlorine dioxide tablets are not available and apparently it's not a distribution issue. It seems Micropur serves different products to different countries).
Forte used to be calciumhypochlorite, now changed to Sodiumdichlorisocyanurate (NaDCC), whatever that is, and claims (as per instructions in the box) 30 min for bacteria and virus and 2 hr for giardia and amoeba. Actually, the active ingredients in MP1 are apparently similar, Sodium Chlorite and Sodium Dichloroisocyanurate Dihydrate, how these combine to produce chorine dioxide, I don't know and what's the output of the Forte formulation, I don't know either.
I've never got sick after using Forte but I've never got sick anyway from backcountry water.