ok- well ive had 5 different tanks over 30 years of reefing. ive tried it all. The most success ive ever had, especially with calcium/alkalinity consuming creatures llike corals and coralline algae, is with higher ph, stable alkalinity and dosing kalk. OP was asking about coralline. You seem to know it all cuz you had one crappy tank for 2 years.Not nessiasasry at all for stability or coralline