Hey
Fire-bellies are great toads, will be active during the day unlike most but also active at night, but take care where placing their tank as they usually try to mate with each other at night and can be quite noisy. It's best to still keep them in groups though, as they are quite communal. My best advice would be to buy a couple books that provide essential in depth information, though forums are also excellent sources of additional info. I think Amphibians in Captivity by Marc Staniszewski is one of the most enjoyable and informative amphibian book I have and the author is very experienced with Bombina, however it is quite expensive and dated. He has also written an online care sheet which is great: http://www.amphibian.co.uk/bombina.html Other useful books would be Frogs and Toads by Devin Edmonds and Popular Amphibians by Philippe de Vosjoli. The Arcadia Guide to Reptile and Amphibian Nutrition written by John-Courtney Smith is very good with helping understand how to properly feed herps, which are less forgiving to unhealthy diets than us. It's worth mentioning that many books or care sheets you will find say that fire-bellied toads do not need UVB, but this is outdated and it has proven to be beneficial. UVB is important for bone development, physical and possibly mental health also. Hope this helps