Good job, the salts Melissa Kaplan is referring to are the "prepared hypotonic and hypertonic fluids" that are contained in intravenous solutions. When you mentioned that you were giving "salts mixed with water" it was unclear how you were doing that. Definitely ringers lactate, 0.9% sodium chloride, and d5w .45% sodium chloride are acceptable fluid replacements. The cloaca is like a sponge when it comes to soaking the animal especially if the snake is strong enough to hold their heads above water and they are alert. Rehydration definitely is the way to go before attempting to get the animal to take semi solid or solid foods also. Worms and pinkies are a good place to begin once rehydration ( fluids) is established first.