That was one of my original concerns - considering my Calc (400-420) and dKH (12) levels, does minimal Coraline growth inherently mean there's something wrong - or that SPS wouldn't be healthy either? Is there any correlation between coraline health and expected SPS health? I'm trying to prepare for keeping SPS, but don't have any yet..

Do I need to do something about a dKH of 12? Too high?

Rampant coraline WAS a pain in the butt. But it looks great, outside its valuable boost to natural filtration. I'd say I have as little as 20% of what I did before. I agree though, its nice not having to scrape very much...

I'll read up and see which of the products recommended here is right for my tank. Maybe just a moderate boost is needed.