Is the pdf visible?
I have the amprolium Corid 20% Soluble Powder, so the liquid instructions don't work. I kept this chart from the manufacturer back when everyone was chicks, figuring I would go by the "Water Tank Mixing" ratio of 1/3 tsp to 1 gallon of water. Since doing 1/3 tsp is hard and I don't have a grams or ounce scale (I should get one, what kind is good?) I would make 3 gallons and do 1 level teaspoon (prevention), throwing out the old mixed water after a couple of days and making it fresh again. Does this jive with your current information?
This was with non-medicated chick starter supplemented with protein every day and a little later non-medicated high-protein game bird feed.