Hey everyone how’s it going? My tank is new, only been up and running since Labor Day and yesterday I came home from work and most of my dry rock and some of the sand was brown with bubbles. I am assuming this is dinos right? The tank is a 20 long and the only thing in it as far as livestock goes is a tiny clown fish, 3 blue leg hermits, 8 nassarius snails, 3 cerith snails, 3 nerite snails, and 4 trochus snails. Any opinions/help will be appreciated