I have a trio of RETF and am thinking about reed frogs in the future. I originally thought of the 12x12x18 for the red eyes but realized that it would be too small. They 're currently in a 24x10x24 and have been doing well for nearly a year. Some of the care sheets I've been reading about reed frogs recommend the 12x12x18 for 3-4. I've decided I'd be more comfortable with an 18x18x18 which I have, but haven't found a place to put yet.
Aliza