djatl;819088 wrote: How much Magnesium are you dosing? Using the BRS 2-part solution, the Magnesium dose is 20ml per 1 gallon of Alk and 1 gallon of Calcium. Unless your consumption is really high, it doesn't seem like you need to dose Magnesium daily. The BRS instructions even say you can add all 20ml after you've used up the gallon of the other two, or add it over the duration. Unless your consumption is really high, or you're going on vacation for a long time, you should be able to half-dose the Magnesium right before you leave and right when you get back. Your tank will probably not notice.