I'm really confused about this growth I'm having on my live rock. I keep thinking its just coralline algae but I have never seen it grow so fast. It also is starting to get on the larger pieces of substrate I have. The rock is BRS fiji dry rock.
Never had Cyano
before and I just don't really believe its that. But hey you never know. It doesn't come off the rocks easily and its not slimy whatsoever.
90 gallon tank is about 2.5 months old. Parameters are as follows:
PH - 8.4
Calcium - 450
Ammonia - 0
Nitrite - 0
Nitrate - below 5
Phosphate - not sure didn't test
Really dont think I have excess nutrients in the tank as I cant even get my Chaeto to grow in my fuge. I also have pretty good flow. Is this just fast growing coralline or should I be worried?