Making your own copper sulfate solution of 1 mg contained copper per drop is very easy. Just measure out the blue copper sulfate crystals and the water. This is about 5/8ths of a teaspoon, or 5 of the 1/8th teaspoons, or about 4.7 grams or 4700 mg of 99% pure copper sulfate pentahydrate (containing 25% … Continue reading How to make a 1mg/drop Liquid Copper Sulfate supplement