Hi! Im new to everything froggy, I hope to be getting my viv in the next week and Im unsure on what sizing is best. I have an idea on what frogs I would like, USA green tree frogs, are these good for beginners? Ive been doing as much research as I can but there is so much conflicting info out there, I was even told by a stockist that a heat mat isnt essential?! Ive joined here to help me be the best I can for my new frogs, any tips or advice is greatly appreciated.