For those using Tech M to raise their magnesium... if you have a larger volume of water in your system, you might want to look into Magnesium Chloride as a substitute. I went through gallons of Tech M before I ordered a five gallon bucket of Mag Chloride from Bulk Reef Supply. I use the formula of 7 cups Mag Chloride to one cup Epsom Salts in a gallon of RO/DI. It makes a great solution which can safely boost MG 50-100 ppm daily. After you reach your desired level, it just takes a little experimentation to determine your tank's desired daily dose requirements... Much cheaper than Tech-M.
LL
Azazael. I disagree. I see some bryopsis IMO inbetween those red polyps in the top leftish part of the pic. The second pic is too blurry, but I wouldn't be surprised if it is.