Well, I will let you know that I have always started my baby monitors off in my 125 gallon fish tank, but a lot of people will give you crap for it. I never seen a difference in growth/health as to when I started them in tanks or built enclosures. However, I usually only keep them in the fish tanks for their first year, then move them to new larger and freshly built enclosures, so I wouldn't personally tell you not to as I have never had any problems.