Few questions about tubs.

[JASBALLS]

I think I'm going to switch to tubs but I have a few (probably stupid) questions.
1. Is there any fire hazard attaching a uth or fw directly to the tub (will be on tstat)
2. How well does a tub keep humidity and heat?
3. If I use paper towel as my substrate, is it alright to just put the probe between the bottom of the tub and the paper towel?
4. Are Rubbermaid brand tubs good to use?
5. (Don't call me stupid) What is the equation of qt. to gal?
6. Is a tub that isn't as long as the bp however still has alot of floor space (ex. 2L x 2W vs. 3L x 1W) alright?
7. Is heat tape better then a uth for creating a gradient?

Thanks, Perry.

1.Yes
2.Very well..
3.I would put it under the tub on the heat sorce.
4.Very good, Sterilites are cheaper though.
5.I'm stupid!
6.Yes
7.Heat tape is the best period.