Looks more like a substance known as foraminiferan. They are made up of spheres and best removal (while some people keep them ) is to take rock out of the tank and place in container of water. You can try to press it down with thumb pressure and peel it back and remove otherwise scrub with firm brushes like below from Harbor freight.Can’t tell what this stuff is. Red in color, slightly fuzzy and doesn’t blow off with turkey baster blast. Haven’t tried scrubbing. Was hopeful it was the start of coraline but I doubt it?
Thanks. Very hard to zoom into this back panel of the tank so apologies for bad photos. I’ll try to get some clearer pics.
Wow super interesting!! I’ll look into itLooks more like a substance known as foraminiferan. They are made up of spheres and best removal (while some people keep them ) is to take rock out of the tank and place in container of water. You can try to press it down with thumb pressure and peel it back and remove otherwise scrub with firm brushes like below from Harbor freight.
