Lol my sand bed is 50% dinos right now the other half is pure white but nothing seems bothered by it so I'm not. They'll go away when they decide to.22 years of owning a reef tank learned me that succes and mishap are a “normal” manifestation in a tank. Firstly: be slow, patience is important. You are way to inpatient. Please Sps corals only after years. Second: corals like ‘dirty” water. A too good functionning Skimmer, roller mat and frequent water changing are imo too much. I change < 2% water per week. Third: check only the most important parameters and try to be constant with them: flow, light, temp, salt level, PH, KH, Calcium, Magnesium, Nitrate and Phosfate. I have never understand why people test (much) more, you will be anxious cq mad to correct a too high or too low extreme ingredient of the water. One warning: people are inclined only to publish pictures on R2R or RC when there tank is blossoming and beautiful. No one is proud to show his /her tank when things are going extremely bad /dirty. So there is a publication bias. Let that not distract you, when your tank is sometimes not functionning. Most reefers know or knew that too.