I met someone today who happens to be having lots of pet snakes in his place, and i told him about my snake and what i was going to inject it with , he told me injecting the snake my destroy an organ of the snake , then he gave me this powder thing he said it was an antibiotic he told me to put the powder in a tub filled with water and put the snake in for 3-5 minuts for 3 days, he said it will help alot if the snake was drinking it (i tried but it didnt even drink the water).....does anyone have an idea what this is???

here are some pics: