Coralline will grow in but it takes time (ie 9 months to a year before you start seeing it). Not sure how your tank is setup but Protein Skimmers do help promote Coralline algae growth. You want to keep your lighting to 8 hours a day max or you will get all kinds of algae you don't want (most notably the ugly green hair algae that precious few things will eat). With FOWLR, as you are aware it's about the look rather than the function. Fish really don't care unless you are putting them under some intense grow light. So create the look you want and limit it to 8 hours and you should be good to go. Frequent filter sock or floss changes (ie every few days) will keep the uglies down as will having a solid clean up crew like the little red hermit crabs. They eat excess food bits that fuel hair algae growth.Steve34k said:Would like some coralline growing. Maybe place some other stuff in th future. No time soon.