I'm new to the salwater nanoreef hobby. Biocube 14 has been up and running about 6 months now. I am growing concerned with the bright "purple stuff" spreading all over my live rock and hermit shells. It's flat, not leafy or mossy. It's starting to overrun everything. I could use some help identifying it. What is it? Is it a problem? if so, how do I correct/control/avoid this?
Sorry - don't have the capabilty to post pictures yet. I know folks would just be guessing.