Kajjan, I have used back yard dirt in my Freshwater planted tank with success, in fact, much better then LFS sand. it's not the fact it(MM) does not work, but the part about selling cheap dirt, repackaging it with a fancy name, and charging people an arm and a leg, yet exaggerated the power of the dirt cheap product (What difference they have from companies packaging sugar water and claiming them as "Reef essential"?). In many tanks of mine, I used regular sand with caulerpa. Same result if not better.
Yes, I was an ex-MM user many many many years ago. So I think that makes my statements worth something since I did use MM as well as regular sand, live mud, live mud + regular sand, and now Southdown growing caulerpa. The only thing I want to make clear is that there is absolutely no difference IMO between growing caulerpa with MM or any other sugarfine or silty subtrate. In fact, I've even experimented iron tablet in live sand trying to boost caulerpa growth.....(Don't bother trying that, hair algae and di
atom responded much faster to the iron releases then caulerpa......)