I don't chelate micros, I buy them already chelated. I can then mix them to GH's Flora Micro formulation, or Jack's/JRPeter's micro formulation, my own formulation, Megacrop's micro formulation, but the concept is the same as macros. IME, a micro regimen remains constant throughout the grow and it is only the macros that are adjusted, if at all. When you mix your own micro concentrate, you are completely free to target your macros with great precision. I achieve my macro targets 100% of the time, but only because I first did the same to the micros and whipped up a half gallon of concentrate that itself will make me 500 gallons of reservoir. FWIW, I'm now running Megacrop Vegan with Calmag, except I didn't buy either, I just used all my own salts that I buy for a fraction of the cost of any one nutrient line. No bullshit, you buy one gallon each of GH 3 part with all supplements, and my salts cost less, I have 100% control, and they'll produce more nutrients than the 1 gal of GH, a LOT more.
In my 420 thread, there is a Bill of Materials on the top of page 3 and all products listed comes to under $200 before shipping from the midwest including all needed chelated micros and enough macros to last a year more or less. For comparrison, I use 40 gals a week. I started out with Jack's, I made this thread, and my growth can be tracked on this site as it is here wher I learned, mostly from
@im4satori and
@nxsov180db though I took it to the furthest extent I could. I wasted a lot of money searching for the cheapest most workable products and 99% of it comes from Custom Hydro Nutrients. I have plenty of products that I will not use, like the rest of Jacks and Peters, plus all of the metallic sulfates are trash unless I score me a farm one day.
If you're gonna go with Jack's or Megacrop, it don't matter, with salts you can try them both and still have the option to try other things. Its a no brainer IMO.