I personally believe stuff like Reptisafe and Reptished etc are just gimmicky. If your water is safe for you to drink, the snake will be fine with it. The same goes for shedding. If you have the husbandry right, the snake will shed fine. They dont carry around Reptisafe, water purification tablets or reptished on them in the wild and they have been getting along fine for millions of years.

If you want to buy that stuff, by all means go for it but for me, i can find better more 'beneficial' stuff to buy my reptiles.