First, can you tell us which type you are going to use? The tylan or tylosin soluble powder is given in the water 1 tsp per gallon of water for 3-5 days. There are 2 strengths of Tylan injectable, 50 mg per ml and 200 mg per ml. The injectable has not been available for some time, but some have some leftover, and a couple of people have reported that they found some.
Tylan 50 injectable dosage is 0.25 ml per pound given 3-4 times a day. It would take a lot of it to put in the water, but you could give each dose in a little food or treat.