Ok, this goes back to my zoanthid thread but i want to figure it out for future sake. I am trying to figure out why my Calcium is so low. I have a few pieces of chalice or montipora ( :( i dont know which, they are tiny) that have completely turned white. They seemed to be doing fine a few weeks ago. Also, the zoanthids that I have had for a month or so are doing a lot better but are not spreading, and I actually see a spot that seems to be receding. They all are very deep in color and opened, and have grown in length since I got them but I am just curious as to why it seems like no coraline algae is growing (I have rocks that have it on it that I have put into the tank) and the corals are doing strange things. (I also have a xenia that pulses but the "fingers" are curled.) I am trying to be patient and not dose anything but the ph is 8.3 and salinity is 2.028, temp 80.2 no Nitrates, Nitrites, Ammonia, or Phos. The only things that seem to be low is Calcium (around 350 and magnesium 1150). I have change about 15% of water every week.

I have the stuff to dose but I don't want to unless absolutely necessary. I have been reading up to try to figure out whether or not to dose. Here are the instuctions from BRS. http://www.bulkreefsupply.com/store/Recipe-1-Instructions-for-Bulk-Packaged-Materials