Are you asking the dose for Duramycin per gallon of water,if yes then 1/4 tsp is incorrect,it should be for 400mg dose 1/2 Tablespoon per gallon of water,for 800mg dose it is 1 Tablespoon per gallon of water.She says 1\4th teaspoon for a gallon of water.
Link for dosage info
www.durvet.com/dl/Durvet-Poultry-Brochure.pdf
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