I am planning to make a micro elements solution using the all-in-one page at James Planted Tank as a rough guide. He mentions using Ascorbic acid as an additive to keep pH in the acidic range to ensure chelated elements stay that way; and using Potassium sorbate as an anti moulding...
I am implementing the EI method to fertilize. I make the mixture of salts for macros. The fertilizers that are recommended for micro (CSM + B for example) are very expensive in my country, because these are imported.
Is there any reference to make a micro fertilizer with dry salts?