I like this idea. Looking forward to seeing how this works out. The temp shift might be ok for shrimp. In the wild though were there might be a temperature shift that is twice this, the shrimp are able to move around to find warmer or cooler spots, for example they can retreat to the bottom of a stream in the middle of the day. Maybe you'll just have to find out for us if this can work.
Since you're not completely planted yet, I would take this opportunity to slope the sand away from the glass, but that's just me.
Looking good so far.