A few updates:
Moved pretty much all of my zoas into here. Everything seems to be MUCH happier already. Dunno if it was lighting, flow, or low nutrients (or some combination of all 3), but many of my zoas that were only partially opened in the cube or a bit curled up (captain americas) are now all open and looking good. I'll try to update some pics soon, right now everything is pretty much tossed in there...I'll start actually scaping the tank once my lighting issue gets worked out.
My planted tank uses the same fixture that I originally had over this tank...long story but the brand new fixture over my planted tank died, so I took the one I had off this tank and moved it to the FW setup. There weren't many corals in there at the time...so no huge loss. I've decided to ditch going with a T5/LED combo and will just be running LEDs over this tank. Right now, Jack is letting me borrow some lighting (thanks again!) until I can get things sorted with this semi-functional Chinese LED.
I need to figure out fish still. I had a 6-line in there after the cycle, but after doing well for a couple weeks he stopped eating and lasted about 4 more days before I found him belly up. Strange/crappy...he was eating frozen brine prior to this and the water tested out fine. I was originally going to just stock the tank with 1 fish...but I may end up with 2 now.
I plan on moving my african flameback angel from the cube into this tank. He's doing well, but is kind of a jerk to my chalk basslet. Not overly aggressive...he just doesn't like the fact that the basslet likes to sleep in the same corner of the tank...so my basslet spends all day hiding from the angel to avoid the angel flaring up at him, which is as bad as it gets. Besides that, there's essentially no algae in the cube for the flameback angel to graze on; there should be plenty in the 20 long. He does pick at the macro, which is fine considering how quickly it grows in the tank...but as much as he grazes, I'd rather him be in the 20 long with just an HOB for filtration. The cube is running a skimmer and GFO...algae is non-existent in there aside from the occasional green film on the glass, which he obviously doesn't touch.
Any suggestions on a pest-control wrasse that might get along with him? He does fine with my lubbocks fairy and yellow coris; unfortunately I can't add a yellow coris to this tank (no sand bed) so I need to look at some other options. I'd rather not try to pair him with a 6-line for obvious reasons. What does that leave? Are there any other pod/nudi/bug eating wrasses (or even other sp.) that I could go with that don't require a sand bed?