There are som many additives adverstied online, that all sem do to very specific things, raise calcium, raise ph, additive for this additive for that !!!!!!, phytoplankton, so on and so forth. it is confusing. I have a 72 bowfront 4 months old 1 yellow tang, small oscellaris 2 clown fish, 1 blue damsel, some softies, and 1 sun coral, +cuc. My parameters are ok. DO I have to be supplwnting my tank? If so what does everyone recommend. I know if I ever add sps, I need to watch my calcium levels etc... Help?? I am so confused