Hey all, just updating after a while of silence. I've put the AC50 on the tank with the carbon and the foam filter pad, and things seem to have started to clear up a bit. The snails and crab are doing fine, and are really fun to watch bury themselves in the sand and whatnot. The hair algae and cyano continues to be pretty out of control, but once I get the tank moved back here to UWW (when the weather warms up a bit) I'll be hitting the water changes pretty hard to try to get that reigned in. I also plan to pick up a small Emerald crab, and may be getting a small Blasto frag from a local reefer before too long.
Thanks for looking, and stay tuned for a real update with pictures!