Hi fellow reefers. I noticed these white dots "see picture". On the front glass on my 60 gallon. What are they ? I have 2 sea urchin. 4 cardinal fish. 1 clown. 4 blue chromis, 1 yasha goby, 1 lawnmower blenny and 1 scooter blenny. Plus coral and cleaning crew ( snails, hermit, emerald crab) Its my first tank. All water parameters are fine and coral is also happy. Thanks guys.