yeah i normally don't like to mess with stuff like that but someone else mentioned that my ph might be too low for the RCS.Is it just better to supplement calcium then?
could i add the shells just for looks though?
again yes.. if you want a more comprehensive solution.. google "wonder shell".. they have all micro and macro minerals and they dissolve over a few weeks so the change will be very gradual
if they really need more nutrients than the wonder shell is giving off, they can pick at it..