I have a 55 gal tank that as of last month became vacant due to savi grew out of it and now i would like a nice viv with dart frogs. I have been researching for about a month now and to my heart break per my nov. 2010 reptile mag. i cannot keep my preferred D.Azureus in groups (so now im setting up a 10 gal viv too lol). I would would like to put a group of 5 to 7 frogs in my 55 gal. My design has in mind a 1 inch deep water feature as well so i would like species suggestion thats not prone to drowning. Also the water feature is still a reluctantly removable factor if need be (if not recomended for any pdf's). Most of my research has been on dendrobates and thumbnail frogs and would prefer to stay w S.American frogs but if someone thinks that mantellas would be a better choice i will also look into them. Any input would be great and thanks a head of time.