well the idea is to get the bacterial cycle working. if that is working then you don't require chemical means. bacteria, and normal water changes, are all you need.
yeah I don't know much about them.. never use. Was just getting at the idea that you don't want anything in there to remove amonia or nitrite as you want to get the cycle going.
not sure what that one does. normally you would remove nitrates with regular wc...
It says nitrate removal, so i guess it won't hurt anyway. I have plants eating a lot of mine