OK I have seen most people here post allot about SeaChem additives and how to use such products in the reef tank. Some here may know the works of Randy Holmes-Farley and if you have never read his articles well you are missing out. I have a hard time keeping focused on all the chemistry stuff but this one article of his should be the bible of reef keepers. please read the link below. http://www.advancedaquarist.com/issues/nov2002/chem.htm Randy Holmes-Farley When he is saying balanced additives he is referring to 2 part Ionic calcium and Alkalinity balanced additives such as B-Ionic and Kent 2 part and Calxmax. When you use these balanced additives I find the only other thing you need (if not running a calcium reactor) is some Kent Turbo Calcium powder ever so often. And some good iodine. No other additives are needed which is a big help to my pocket book. All I ask of you reefers is to read and keep your SeaChem minds open for some great knowledge. Let the additive War talks begin.