I just started my new tank. I decided to try something different. I used all dry dead rock. I wanted no pest good or bad. Tanked cycled started adding fish. Water pars excellent. Alk 8 -cal 420-nitrates 5 ppm- phos- 02 , Mag- 1350. Salinity 35- Very stable. But for some reason the SPS frags just stood the same no growth. Plenty of flow and plenty of lighting. Exactly had to lower white led lights. Did better with more blues. But never gotten the SPS to encrusted. My question is the system to new and not mature or too clean. Is it a bacteria thing that we fully don't understand . I hear a few people say the same thing when they started from a new tank. Once they added live Rock SPS started to thrive.