Coralline algae is one of the most important things to grow on tank raised live rocks.
Coralline algae can not grow in a system until you introduce it by adding live rocks. The more types of Coralline that you introduce the more types you will find growing on your tank raised live rocks. Ask your reef store if you can help by scraping the front glass on their coralline covered show tank. You can attach a small siphon to the razor and collect the coralline that you remove. 3 week old living arch with coralline algae starting to grow Calcium is one of the most important things to add to your live rock growing tanks.