Just to keep everybody up to date.....we have lost or are in the process of losing all of our SPS (acro's and montipora's)! Our three plate corals aren't looking particularly happy and one favia (my favorite, of course), out of three, is beginning to show skeleton! We have been dosing the MB7 and our ammonia is down to almost 0. We had our LFS send their "tank" guy to take a look at our tank, take measurements and tell us what we are doing wrong. He told us we had plenty of flow and our parameters were perfect! Could our ammonia spike, which is now over, be the cause of all of the death and destruction? Why are things still dying if the ammonia is now 0 and the LFS and our own testing states our parameters are perfect. Our Mg is still low at 1350, but that shouldn't cause this. Our Alk has been btw. 8.6-8.8, Ca 450, Nitrates, Nitrites & ammonia are 0. We are in the process of changing our MH light to LED's with T5's with a controller to dose the 2 part Ca/alk. Is a fluctuation btw 8.6-8.8 enough to cause this. I am looking for a reason as to why we have lost so much coral and $. I am trying to stay positive...I was actually hoping the LFS guy would find something wrong so at least we can fix it. Where do we go from here?!