Mine is not leafy and the only way to get it off the rock is to use tweezers, very stubborn roots. It does not seem to be spreading. Does this look like what you had or is it different.I had it for many years with no ill effects. It grew in lower areas of the rock work and came on the 250lbs of live rock I got. Nowhere above the half way line of the height of my 150. It is leafy and def not cyano. Eventually it went away on its own. Was cool and unique for sure ...never saw it anywhere else until now
Holy Necro of a 7 year old thread lolHere is a page that explains all the different types of coralline algae. That red plating/branching algae is most definitely coralline, and in fact is considered a "keystone species" on the natural reef. There are 2 main types of coralline, articulated and nonarticulated. The branching/plating is a type of articulated coralline, and the common purple encrusting on rocks that we normally see in the hobby are nonarticulated.
Coralline Algae Types
Wow! That's growing well. Coralline can be a love hate relationship with our tanks. For FOWLR tanks people like coralline since there's nothing else on the rock. But when you're keeping coral, the coralline is just another source thats sucking up your Calc & Alk since it's a calcifiying algae. This is why people use things like urchins to eat the coralline since it's in direct competition with hard corals as far as elements in the water column.I also have encrusting coraline. I was told I had good mag numbers for coraline like this and it is a sign tank is doing good?