if your doing full zeo, what is your ph at using instant ocean?
I started to use zeo and the reactor and was told that my salt was not good for the zeo system that requires a low ph.
if your running instant ocean you must be doing something to drop your ph before adding to your tank..
my choice of salt is seachem and i stopped using zeo only as i didnt want to change salts.
as you can see reef crystals is low in calcium, so your spending about the same amount of money to add supplemental calcium to your tank as you would for the recomened salt for a full zeo system.
Zeos thread on seachem and ph
http://www.zeovit.com/forums/showthread.php?t=6849