So what does white do? If they're both enhancers of color(crimson and white) what's the difference?
Pull the trigger, you'll be happy you did. So far every product has worked as advertised....I actually see a difference after I've been supplementing Shield and Stout over the last week. The shells are shiny and thick....my water also seems VERY VERY VERY clean all of the sudden. I think it's contributed to all the beneficial bacteria stuff from Shield.