One of the great things about Salamandra
is that they're quite forgiving when it comes to how they're kept. As long as they're kept moist and relatively cool (less than the early 20s <SUP>o</SUP>Celsius/ less than early 70s <SUP>o</SUP>F) they tend to do well.
Their natural habitat is the forest floor, and since that's usually covered in decaying organic matter, it tends to be a little acidic. Terrestrial salamanders need to be relatively tough when it comes to pH, so don't worry about it.
The water is unnecessary as long as you keep the tank moist - they don't enter the water in the wild, except to give birth.
I suggest you have a look at Caudate Central's Salamandra
Information sheet. Here's a link
If you've any questions after that, please feel free to post more here.