I´m pretty sure it´s Salamandra salamandra terrestris, although it could be fastuosa. Doesn´t look bernardezi to me.
Didn´t the person that sold it to you tell you the subespecies? that´s odd.
About the tank, i personally think you chose a type of husbandry that´s more suited for reptiles. What you need for a fire salamander is a woodland terrarium, with leaf litter, several hides and cover possibilities, moss, etc. You can find plenty of information and examples in this forum and in Caudata Culture.