what tank do you use? and a few other questions

[spires33]

I was wondering what specific tank you use for dart frogs.
How many bumblebee darts can go in a 10 gallon (i have read 1, 2 and 3 im not sure what to believe anymore but if i dont get a clear answer than im going with 1)
If 2 frogs are ok in 10 gallon would it be better to start with 1 than 2? because i would love to breed someday.
And if you cant tell this will be my first dart frog