Glass for DSB

[Tigger]

I currently have crush coral with agraganite sand on top, and I was told that this was a big factor in why I have such a high nitrate concentration. I am thinking of switching over to domilite lime. Is there a way to easily separate the crush coral from the agraganite? Is it worth while to try and save some of this stuff? I figure if I throw everything away, I will be removing what little worms and copepods I have. Can we buy these critters in to put into the tank? Should I move all my old stuff to one side and put the domilite lime on the other side and hope the critters migrate to the domilite lime? This whole thing is getting complicated. Is it even worthwhile to switch over?

Steve