I have been working on a Mineral oil submerge mining rig for the past couple weeks. I got it up and running so I thought I'd share.

http://youtu.be/EpNERMxvPTk

I'm going to fill it up enough to allow the mineral oil to flow over the cards. I also plan on adding a reservoir that the main pump sits in. Allowing the warm fluid from the top to spill over.