Just as an experiment I started dosing vinegar last week. I started with .2ml and am now up to 5ml. The scrubber is my only filtration. My hope was that the extra bacteria would feed the soft corals. The only changes so far have been a touch more color in some soft corals(could just be due to water clarity) and less algae on front glass. I know a while back Santamonica had dabbled in carbon dosing, I wonder what he observed?