I've grown nannochloropsis, it's small 2 microns. Scientific paper say that Carnation corals consume different types of algae and diatoms. I've been feeding mine different stuff so still alive and no atrophy
They had 2 different kits so I got one of each. Nano and Tetra. I watched a couple of videos and I also added rubbing alcohol to the amazon cart. It seems everything needs to be sterile or crashes will occur.
I have plenty of diatoms in the tank. LOL