I have two Venezuelan Suntigers that currently live in what I like to call “temporary housing”. (Something medium sized so they have room to move without drowning.) My “grown up”-terrariums is the Exo Terra Mini Tall. I have changed the tops, put in plenty of substrate and more than a few hiding places. My question to all you knowledgeable people is: how big should they be before I transfer them into their forever homes? They are about 5-6 cm across right now..