If your viv is 39 inches (about a meter) high, 12 inches wide and 8 inches deep, you have about a 60 gallon tank (Quick Calculator for Aquariums).

Some will say you can put 1 frog per 5 gallons. I myself prefer putting 1 frog per 10 gallons. The more space we can give them, the better I feel about their life in captivity. Thumbs are very small, but some are bold (Imitators & Vanzolini for example). If you have lots of plants and leafage, they will feel secure, and you will see them quite often. I only have two R. ventrimaculata in a 29 gallons and I see them each day on the bromeliad. And with their amazing colors, they are hard to miss.



Eric