The response to the PH question I asked has been answered by Randy Holmes-Farley where in part he said "In my tank, the sand bed has a pH in the mid to upper 7's. My sand is calcium carbonate (oolitic aragonite), which is dissolving at that the low end of that pH range. I'm quite sure that dolomite will also dissolve at that pH. But, the diffusion of magnesium up to the surface is going to be slow, and the magnesium level in seawater is more than 5 times the calcium (on a mole basis). Consequently, I don't see the dissolution of dolomite in deeper regions of the sand as being a big problem."
He also makes reference to a fellow named Spotte who did an extensive write-up in "captive seawater fishes." I would like to see if I can find this as it would probably answer a couple of questions that still remain.
For now I am still committed to adding Dolomite now more that ever just to study it and see the effects. If nothing else came out of this for myself I now know that I will be keeping a close eye on the magnesium levels and testing for it once a month. The link to the question and whole answer (well worth reading) is
http://www.reefcentral.com/vbulletin...threadid=58766
-Danny