Floating what? Floating GROUND, NOOB. I figured out why I was losing commands randomly. When I went from the IR LED to hard-wiring it to the lights I pulled out the pulldown resistor I was using. I can't believe I didn't think of it but that's what you get when you drop out of electronics for software engineering and don't do any projects at home for a few years.
Glad I've got that sorted out, but I've been busy getting everything else set up. Found a stand and I've been rebuilding it to my liking. Ran plumbing and electrical, put in the sump and filter. Tomorrow, I drill the tank and attach the overflow.
Here's a timelapse of a sunrise. My camera ran out of juice before I could record a whole 24hours: https://www.youtube.com/watch?v=R5EA7GHj2FQ&hd=1