I just used aragomax for a DSB in my fuge. I've heard good things about it, but then again I have heard just as good things about sugar sized oolite and aragomax in the fuge. I think they do hype it up as being the best thing ever, when it is about on par with regular reef sand. Try it out it can't hurt anything so you can report back with your results. What are the prices on the miracle mud? Is it the same lb. for lb. as reef sand? If its more expensive I might rethink using it as others have said its hyped up being a lot better than reef sand, but is pretty much on par with sand.