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Not sure what you mean, you have to make the gallon stock with the packet and a gallon of water and then add that stock 2TBL to a gal waterer for treatment. No???
Quote: I skim read, so my first thought was that one would use 2 tablespoons of the powder per gallon, but that didn't seem quite right, because I know that two tablespoons of the powder = ~20,000 mg sulfamethazine and the per gallon dose should be closer to 3750 mg. Anyway, apparently I'm not the only one that skim reads because someone on another thread read it the same way and they mixed their gallon with two tablespoons of the powder.
-Kathy