I have a 120 gallon tank with fish, live rock and sand, currently I have 12 fish, 2 shrimp, and an emerald crab along with about 110 lbs of live rock. For filtration I have a 55 gallon refugium. My old refugium broke a few weeks ago and I had to replace a few of the panels so it was out of commison for about a week as I repaired it.
A week later I now have this brownish/black stuff growing everywhere. It started on the water jet and has moved onto a rock, the glass and is quickly covering the sand. I have included a few pictures... any advice on what it is and what I should do would greatly help!!!!
I am fairly new to the saltwater world only haveing my setup for a few months now. I bought the entire setup, tank, rock, fish, and refugium already setup and running. I have been doing water changes and I have a protein skimmer running.
Hope you can tell what I have from these photos.