Yes dosing. Google reefkeeping magazine vinegar dosing. Theres a lot of good info and a chart for how much to does. Also there is another thread on Canreef
http://www.canreef.com/vbulletin/sho...hreadid=110956. Reefwars put up the chart for how much vinegar to use in a 4 week process. The reefkeeping magazine chart is more drawn out over sixteen weeks.