Need More Snails, But What Kind?

[Beverly]

I need to order more snails for my upgraded tanks because there is so much more freaking glass and rock for the ones I already have to clean I also have a couple of very small tufts of fuzzy green algae that I'm hoping the snails will clean up for me.

However, I don't know which snails would be better for these tasks - astreas or margaritas.

Here's what J&L has to say about margaritas:

http://www.jlaquatics.com/cgi-bin/sh...alogno=rc-marg

And astreas:

http://www.jlaquatics.com/cgi-bin/sh...ogno=rc-asnail

I'm probably only going to get one species. Which one would suit my needs best? All opinions welcome