This 25.6 oz packet contains 102.4 g chlortetracycline HCl (64 g/lb) and will make the resulting concentrations:
Gallons of water
1024
512
256
102.4
Chlortetracycline HCl per gallon
100 mg
200 mg
400 mg
1000 mg
Dosages in terms of packets per 512 gallons are based on stated dosages per unit of body weight and average water consumption of the species. Weather conditions, ambient temperature, humidity, age, class of livestock and other factors may affect consumption and, except where calves are drenched, the unit dosage should be used as a guide to effective use in drinking water. Animal must actually consume enough medicated water to provide the desired therapeutic dose under the conditions that prevail.