Here's the latest on the tank. I added a bunch of baby tears the other day, and a few anubias on the left behind the group of rocks. I think these will look real nice once they grow up
I upgraded the regulator as well. I bought a clippard ET-3M-24 mouse solenoid and I got a good deal on a Swagelok B-SS4 needle valve, but MAN are the swagelok connectors expensive! Who knew? That was a bit of an ordeal. The guys at swagelok had a real hard time trying to figure out how to connect everything to the Clippard's manifold port. Here's a look at it all assembled:
I'm also working on putting together an Arduino based DIY aquarium controller like Mike_in_MD's seen here: DIY Aquarium Touchscreen Controller - The Planted Tank Forum
I don't have any experience with this kind of thing, but it seems like a really fun project. It will allow me to monitor the temp, pH, control the lighting, my co2, and all sorts of fun stuff. They sky is the limit.