I jumped on this when I learned about how chelates work at various pH's. I thought it'd be a good way to get iron to my plants given that my gh and kh are both around 10. I have reason to suspect the gh is mostly calcium, though. I'm currently introducing RO water with each weekly water change.
I know micro dosing is a sensitive topic, especially at the moment, but I'd like to learn from the opinions of people who are more successful than I am.
A penny for your thoughts?
You can buy almost everything on Ebay from Alpha Chemicals and the rest from other Ebay sellers, depends on your tank size the quantities you will want.
I bought mine from Burr740, he packaged everything nicely and provides a nice plastic box with his cool logo so I didn't go the Ebay route as my tank is small(17g) I have 3 - 10 years worth of everything from Burr740.
The Macros I bought from NilocG but GLA should be just as good.
The greatest issue you will run into is measuring out the small quantity micros (Boron, Copper, Nickel, Molybdnum) you will need a mg scale for that (get a jeweler's scale with calibration weights and go to 3 decimals) but hobby grade scales are still not accurate or consistent enough to measure out 5 - 20mg quantities the error is too high.
The greatest way to solve that issue is to make up 500ml of 50X more concentrated solution of those, and then just dilute it down by taking 10ml of that solution and mix it with your distilled water Fe solution for the correct ppm concentration in your final 500ml micro solution.
If you are motivated enough this is a way to solve the 'non uniform mixing' problem in CSM and ensure you know exactly what ppm of each element you are adding. Also if your degassed water ever goes above ph 6.5 you will want DTPA Fe instead of EDTA Fe so that everything you are adding is bioavailable and there is no decomposition loss.
Maybe it takes an hour to measure everything out for your Macro and Micro solutions and I prefer to add 5ml doses of each for accuracy, so I only need to make up solutions every 6 - 7 months or so. That is a good timeframe as the Micros can go off and grow mould (even with added acid) after a period of time.