I cant decide whether to get just frogs or a frog and a betta, but I think i'm swaying towards just the frogs. 30litres works out to around 7/8 gallons i think so I'll start with 4 froggies once its cycled and go from there
Luckily I'm still learning stuff from this post so by the time the tank is ready for them I should be all knowing!! or at least, not quite as likely to kill the poor things
I think a dwarf only tank would be really neat. That way you can have more, than if you were to put a betta in with them.
I'm actually debating the same thing for my 10 gallon right. I have a betta in in a 2 gallon at work, and I dont know if I want to try to breed him in the 10 gallon since he's such a looker or if I want to put frogs in it!