Aww Nate Please don't blame yourself.

Just so people understand better, I got a frantic phone call about the missing froggie, because Nate-Dad was SO worried and scared for them

I've suggested that Nathan might even need a different type of tank. This one is not "professionally" made, and perhaps this could be the problem?

Don't feel bad, Nate. Like everyone has said, now you know how fast the water can evaporate, etc, so you can be extra careful.