So I've got a few question about either of these species. I've been wanting to keep members of either of these species for quite the while and was wondering which would you get as a starter of either species?

Are these species hardy/forgiving by any means? I know they require a moist medium to burrow in, a large amount of substrate, etc. And yes, I do know they're extremely defensive at times. How do you add water to the enclosure? (via injection or sprinkle on top?)

What's the growth rate for both of these species, what would I expect from .75" sling in a year if given weekly feedings? What size do you tend to see the defensiveness set in? Also, would these species do fine at 70 degree temps?

What's a good way to rehouse them that's the least stressful for the T (most importantly) and the keeper?

I also have a question humidity wise, I've heard people use vermiculite to help up the humidity. I was thinking of using a mix of peat moss, top soil and some vermiculite mixed in. Would this kind of vermiculite be okay: http://www.homedepot.com/p/THERMOROC...9702/202187625

Just wanted to get a feel for them before I make the choice to own one. Thanks