Hi, a few quick questions.

First off, where can I get a decent digital scale for relatively cheap?

Secondly, and more importantly, I have a 20 gal terrarium I am planning on putting my ball into when I get it, and was handed down two different sized UTHs. One is a 10-20 gal, and the other is what I'm assuming is a 5-10gal. I was told to cover 1/3 of the tank floor, an the 10-20 gal UTH doesn't quite cut it. If I place them next to each other on the tank floor and plugged into the same thermostat will that work fine?

Also, the 5-10 gal UTH was previously attached to another tank, so I peeled it off and covered it with tin foil, and am planning on attaching it to my tank with foil tape, if I end up using it. Will this work? Here's a picture:



Thanks,

Devin