How many tiger legged monkey tree frogs can I put in a 12x18x18 tank??

[chefrobert]

Just wonder right now I have one guy and I am thinking about putting two more in Is that safe??

[Creamballman]

depends. How big is he (inches?). That size definitely big enough for 2, maybe three, but it depends on the size of the frog like I said. Also, they HAVE to be the same or close size (no froglets with adults), or they will eat each other.