I bet my google-fu is failing, but all I can find so far is on bullfrogs and dart frogs... How many tree frogs should one have per gallon? 1 frog per 5 gallons seems common, with lots of people saying 1 per 10 is better.

I ask because, while searching online for a 2nd hand terrarium, I found one in a frogs+tank+gear deal, and the owner (on-selling because s/he "didn't have time for them any more") blithely reports that there are seven golden bell frogs in an Exo-Terra mini/tall.

That's 30 x 30 x 45 cm - about 10 gallons? Seven?!?

I'm kind of torn, because I would love to rescue them from this semi-literate individual, but that would just return me to my original dilemma of needing to buy a *another* bigger tank - or two! - and splitting them up between the tanks.