what additives do i need for my reef tank?

[tontra]

I plan to keep a mix of lps and sps coral. What additives will i need to keep around? I heard 2 part calcium and buffer, and iodine for sure.

 

[bertoni]

I'd skip the iodine. The 2-part should be fine, but you might need some magnesium supplement eventually. A test kit would be a good idea. This article covers all the water parameters, and the need for supplements:

http://www.reefkeeping.com/issues/2004-05/rhf/index.php

 

[Hendersonracing]

maily just calcium buffer & alkalinity & magnesium buffers...