I like the idea of lutino/albino red-eyes, although I haven't seen them for sale in the UK. What about black-eyed treefrogs, or tiger-legged treefrogs? Are they close enough to not freak out the red-eyes? My other question is, considering the size of my terrarium (1.2m x 1m x 41cm), how many frogs do you think I could comfortably put in there?