Okay so now I'm totally confused we decided to look into getting UVB lighting for our terrarium and have been told by the Reptile store here that puting even a UVB light source on such a small terrarium could be dangerous to the frog.

Our terrarium is 12"x12"x12" (ZooMed Naturalistic I believe its called)
And as I said Frodo is A Grey Treefrog (eastern/ Hyla veriscolor we believe due to finding it here in Ontario)

Anyone know anything about if this is true?

Is the calcium supplement really enough to give him the D3 vitamins he'd get from a light.