i want to say its brown hair algae but not really sure as this stuff just grows insanely fast and in very very very weird patterns on the glass, almost like veins in the body! its all over my livrock and all over the glass! ill clean the glass than a few hours later its back! also will blow off the rocks bc it comes off very easy, and its right back on everything in hours!! I havent switched salts, havent switched anything except got a beast of a skimmer, the new skimz pyramid sp187 that skims retartedly good, and got an mp 40 and mp10 , and a brand spankin new rodi 75 gpd unit from BRS that reads only 2 ppm water going into the unit from my tap water and 0 ppm water coming out using in the tank!! so im not really sure whats going on....i just got two big buckets of coral pro as well.....anybody help??