i bought this just before the reef solutions swap. it hasnt grown much, there has been a little bit of decay as you can see in the pick. this is because my sump got low while i was on vacation and that caused a lot air bubbles in the tank. the air gets trapped in its matrix of spicules causing tissue to die. i feed the tank home grown phytoplankton and reef pearls. its non-photosynthetic as well so it is pretty dependent on the feedings.