So I've read afew posts about not adding supplements and was curious as to what this is referring to. I understand that different minerals etc are naturally occurring but I thought that things needed to be supplemented in aquariums because of the inhabitants depleting the natural supply. I am in part wondering because I have a green star polyp frag which I've heard grows rapidly but mine has hardly grown since I got it a month an a half ago... The polyps are out an look great but no real growth. So I figured maybe some of the trace elements would help but also read they weren't necessary.