scarlets get huge though dont they? im pretty sure they do, and can be destructive to your rockwork. I have one scarlet and a bunch of blues, as well as other different kinds. I have more blues mainly because they are 2 bucks while scarlets are 4. They are also much smaller, but do grow. But arent scarlets carniverous while blue legs are omnivours? I thought i had heard that somewhere... i may be mistaken though.