I have a 1.2 group on water soluble tetracycline powder for 4 days in a 8 oz bottle. I used a jug filled with 1.3 liters of water and a 500mg packet mixed in. The medicine bottle needs to be changed every 3 days and the water bottle needs to be switched out everyday. Both are covered due to light sensitivity.

Today after listening to their chest I can see a small improvement. I will continue the medicine for another 4 days and see how everyone is doing.