@ monkiboy - I agree with you completely about Mike and Julian, both have exceptional husbandry. I listened in on a webinar given my Mark Callahan, and the question about MM was brought up as well. Quick synopsis is that it was difficult for others to manage and dial in as well. Carbon dosing, in one form or another, along with a good skimmer seemed to be just as effective. It makes me wonder, researching all this is whether a refugium is a worthwhile adventure at all. If it's for the beauty of it, I can see the point, but if it's for nutrient export, I have a hard time seeing it's strengths when compared to carbon dosing and strong skimming. The conclusion that I am slowly coming to accept is that, it is very multifactorial, a sum of many small parts and that the work you are willing to put into it will make or break your reef. This topic as I delve into it more deeply is causing more confusion.