Planning to use some reef epoxy putty to secure the lava rock this weekend, as I'll be moving several hundred miles away with all my tanks soon.
Also - and I am absolutely unsure how this occurred - there's a Crystal Red Shrimp or two hiding out in the tank. Guessing they came in with Fissidens when really tiny? I am always super-careful, so I'm absolutely floored.
You can see the really white shrimp just off center (right) in the photo above. Those other white spots are young Malaysian Trumpet Snails.