What to supplement in a reef tank

[sundance]

My reef tank is about 4 months old and starting to do really good I think. Coralline is showing up all over. My polyps are multiplying and my Xenia is budding. I have been doing some supplementing but need some advice on what I should be testing for and supplementing as well as what supplements are redundant? In other words I am using Reef Plus and Trace, two products by different Mfg. Do they do the same thing? Give me some input of what you guys are supplementing? I understand, don’t add it if you don’t test for it.
Thanks,
Sundance
P.S.
I am adding currently on a regular bases:
Reef Cal and Reef Plus by Seachem
Marine Success Green by Red Sea
I am adding as needed per. water test:
Iodine
Strontium
Iron

 

[nas19320]

I only do water changes and drip kalk. Occassionally add a little Mg and use a two part additive to raise my levels. HTH