IMO i think the herpstat pro is not worth the money. I have 4 regular herpstats and everything runs smooth. Hatchrite is just moistened perlite. i'm a gecko breeder and there is no reason that i can't do the math on my own for water/perlite ratio. for our eggs we use a 1/.8 perlite/water by weight ratio. I don't know how humid snake eggs need to be though.