A More Economic Trace Without Copper?

I know that the small amounts in CSM+B (Nutritrace, I think it's called here) shouldn't have toxic levels (I've done my research) and it's chelated at that (I think), BUT I'm paranoid and would prefer to just avoid dosing copper. This isn't something that I can just chill about bc it's just getting to me.

That being said, where do you find an economically priced trace without copper?!

The liquids I see recommended on shrimp places cost more than an entire Macro and micro package! And for not nearly as much since you're buying it in liquid. If I have a 10 gallon for each of my different shrimps, that's going to be ridiculous.

Someone's got to make a cheaper dry stock without copper and with chelated iron?

And if I add 1 mL of Excel/glut to my 250mL liquid stock to keep away mold, is that going to be safe for the shrimp? Or should I use a different preservative? Refrigeration isn't an option. Btw, the Excel isn't really doing what I need it to do. My macro and micro smell fermented and have white pieces floating in it. Should I use HCL and how much? Would that be safe for sensitive inverts? Or should I use a different preservative, and how much? My well water is 6.5 ph (I think I'm remembering, I have it written somewhere), so I don't want to acidify it.

Btw, I do PPS-Pro and not EI because it's just easier for me with my erratic health and lack of a schedule. I don't know if that makes a difference or not, but I thought I'd throw that out there.