No I don't have a surface skimmer, I'm pretty new to this whole keeping corals thing. So far I have got some zoo frags a couple monte's, a ricardia and zuma, an acro, and a birdsnest. Everything is doing good except for the acro and monte's whose polyps barley come out. I don't know when to add the supplements other than calcium, cause I test for it. Should I add a supplement one a day instead all at the same time? Am I supposed to keep my skimmer off when I add them?