might be far off from asking this question, but ive been slow to keep up with my salt tank, and was wondering is it possible if my live rock died ? They have been in saltwater the whole time with a filter and heater, is it possible for it to die ?
Never ask a Barber for a haircut, the answer is always yes.
calcium will help only if you need it. You don't want to be dosing unless you're also testing. Make sure your not putting too much calcium into the system.
if you're LR isn't completely cured, you should cure it first. Die off usually appears white. It's common to have some dieoff after recieving LR but again, if it was cured to start with, you shouldn't have to worry about it dying off any more really.