Posting here because you guys know best about coralline as i have never experienced it before. I have a 125 gallon brackish tank, sg
1.013. last month i added 275 lbs of live sand and 100lbs of base rock from a reef tank someone was breaking down. I had a little nitrite spike the first few days and then it dropped to 0. Soon after that a diatom bloom happened and after about 2 weeks it subsided. Now i have white circles forming all over the rocks, and glass even under the sand i have a circle. Could this be coralline starting? Didn't know it could grow in low salt if it is. If not what else could it be? ph 8.2 nitrate 80 phosphate almost 0 Ive been using rowaphos to reduce phosphates.