Why do my SPS grow at the bottom, not the top


New member
I have various SPS corals in a mixed reef tank. Mostly easy to keep SPS along with LPS. Pocillopora, Seriatapora, and a few Acros.

But the growth pattern is for them to spread along the live rock I have them attatched to rather than branching and growing taller.

Is it light? Flow? Combination?


New member
That's what they do. They grow a strong base so they can support themselves as they grow. Just like a house, you need a strong foundation.


New member
Yeah they will encrust onto the rock for a while before they start growing vertically. Acros in particular seem to want to encrust over everything before they branch out.


Unregistered Member
High flow seems to encourage acro to encrust heavily, but for that matter some acros just lay down more of a base than others. I have a pink millie that has created a huge base, and then all of a sudden started sending up branches all over.