I was wondering if anyone had any info about Vietnamese Mossy Frogs

Poison Dart Frogs Poison Arrow Frogs Dart Frogs & Poison Arrow Dart Frogs Terrarium Animals from Saurian Enterprises, Inc.
Place to purchase them

Poison Dart Frogs Poison Arrow Frogs Dart Frogs & Poison Arrow Dart Frogs Terrarium Animals from Saurian Enterprises, Inc.
A care sheet

That care sheet doesn't say if they are hostile in groups and how many can live in the 30 gallon that they describes. I am also guessing that they are similar to Fire Bellied Frogs