vetteguy53081
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Im seeing diatoms here which can appear in an established reef tank and looks ugly but in most cases are harmless and feed mainly off of silicates as well as dissolved organic compounds, phosphate and nitrates. You will also see diatoms with an RODI unit if the cartridge that removes silicates becomes expired. Some cleaner crew to help control it are : Cerith snails, Nerite snails and Trochus snails and also Astraea snails are effective at removing diatoms.Sorry, I misread and meant to specify CP Elite in my response. Here’s some pictures.
With Dino, biological deficiencies cause the dino structure and your tests will show lower numbers with po4 and no3