I have coraline growing on one side of my tank, but no the other. The other side mostly had like green turf looking stuff until I added a second power head to my biocube, now its clearing off and I'm hopeing to get the coraline to start growing there as well. By the way, how do u get rid of red algae. Not sure if its red cyano or red bubble algae bc it has bubbles growing under it in places. I scrapwed it off the two spots it was growing and sucked it out with a baster, but then two days later I noticed it growing back at the same places, but then two new places poped up! Uggghhhhh! My cuc won't touch it.