I use a product called Reef Solutions, it is made by EcoSystem Aquarium. It contains multiple minerals,iodine, strontium, and magnesium. It`s a pretty good allaround additive for fish and reef tanks. I also use Kent`s Liquid Calcium and ProBuffer, my best advice is to find a brand you like and stick to that.
I'm not much of a additive type reefkeeper...Seachems Reef Builder & Advantage for establishing calcium/alkalinity...kalkwasser to maintain established levels...and monthly 5%-10% water change for trace elements.I choose not to add any other products and refrain from adding anything that I can not accurately test for.
I use Kent Micro Vert, Coral Vite, Iodine, Iron, Coral Accel, super Strountium with Molybedenum, Liquid Calcium, Phytoplex, Chromaplex. and Seachem Reef Buffer. and a 20% monthly water change.