hatchrite or THG water stuff

[Ravana's_Reptiles]

I will be breeding this coming season and i want to know what the diffeence between hatchrite and the water icemer stuff from THG also do i need to add water to hatchrite my dad and brother breed ball pythons and beardies and they do it differently my bother adds water for the pythons but my dad doesnt for the beardies.
Whats best for eckos