Wazine17 for worming

[Roosters110]

Just went to store and bought this.Curious and need help with chicken math.I have eighteen chickens and three ducks.It says 1600 chickens 4-6 weeks,now I need help figuring how much I should put in the two gallon waterers.Only seems to be info for young chicks.No direct direction for other ages other than young birds.
Help please,especially people who have experience with it.

 

[Eggcessive]

Use 1 ounce or 30 ml of Wazine 17 per gallon of drinking water for 24 hours then remove it and replace with the usual fresh untreated water. Wazine will treat only roundworms in chickens.