This is what the container says:
Chickens and turkeys (water mixing): Remove regular source of water the night before treatment. Supply only medicated water during treatment period. To prevent reinfestation, clean all pens and equipment after treatment. Prepare medicated water by adding 400 g (1 pouch) of powder to 320 L of water or 1 kg of powder to 800 L of water. Give medicated water to birds in the morning. Return to regular water supply after treatment (usually 4 to 8 hours).
I saw roundworms in two separate droppings yesterday and have this on hand. I know there are other products that will kill of a number of other parasites as well but this is what I plan to use for now.
Hoping that someone has used it on a smaller flock and can give me a like tsp to gallon or litre ratio.