so i dose the brs 2 part with mag.

[rjwilcox]

I started dosing the brs 2 part and mag about six months ago. works great.

WHAT OTHER SUPPLEMENTS SHOULD I BE DOSING?

I mostly have live rock, a couple finger leathers, torch coral, birds nest frag, blue ridge frag, 4 fish and about a dozen snails. i do 20 gal water changes weekly on a 100 gal system using reef crystals.

[bertoni]

Some people add various elements to change coral coloration. I don't know much about them, but the SPS forum has a lot of people who do that sort of dosing. The other interesting things to dose would be iron (for macroalgae) or silicate (for sponges and perhaps snails). This article might help:

http://reefkeeping.com/issues/2007-04/rhf/index.php

Carbon dosing is another approach that some people use. It can reduce the nutrient level in a tank, helping to remove various photosynthetic pests, and carbon dosing can change coral coloration, too.