I’m not sure if I am really seeing something, or it’s just a coincidence? I usually run BRS Rox 0.8 carbon in my BRS mini reactor. My ORP usually sits around 300-330. This week I decided to use some Red Sea Reef Spec Carbon. Within 8 hours or so my ORP started rising and is now sitting around 350-370. I don’t use ozone either. What’s funny is that the Red Sea stuff doesn’t seem to remove as much smell as the Rox 0.8. It’s not horrible, but I can definitely smell the ocean in my office where I never have before. The water is still crystal clear, just has that ocean smell.