Originally Posted by Hinds04
I test my calcium and keep it between 450-500
from just instant ocean water changes? if that's what you are saying, then i would invest in a more accurate calcium test kit, because the one you have is off quite a bit.
if you are adding calcium to the water, make sure you are adding an alk
buffer as well.
i really don't think you need to add anything to the water if you use a reef grade salt mix, like the "reef crystals" brand mentioned or some other.
if you use the regular instant ocean salt mix, you'll need to add to it in order to get it close to NSW