How much Poly-Vi-Sol ?

[GaDawg]

I had a weak chick (4 wks. old) on Friday and thanks to BYC I was able to treat her and able to put her back with the others this afternoon.
I was treating her with poly-vi-sol drops in her beak and now I would like to put some in the waterer.

Does anyone know the dosage for a 1/2 gallon waterer or maybe a quart of water?

thank you