Personally I would do one thing at a time rather than all three. This will allow you to see which if any has the greatest effect and if things start going south you can also identify which additive it was.

I am not a fan of any additives or supplements other than calcium, alkalinity and magnesium and my tanks do great, both softies and stony corals. 25 years ago I added things like iodine, iodide, strontium and all the others and found it just got me in trouble so tossed it all and went back to the basics above plus good circulation/oxygenation and lighting.