The diatoms are loving the fluorescent lighting... they're pearling like crazy, assuming it's the actinic spectrum that does it. Is kind of fun watching the pearled diatoms catch rides to the water's surface where the bubbles are released... the diatoms and the sand grains raining back down to the ground.
The shrimp are doing well, too. Noted several fresh molts under their shared shelter this afternoon.
Seems the chaeto is growing. No pearling on it that I've noticed, though.
Hey Rob! I noticed you don't have any type of filtration, may I suggest a sponge filter? If you don't want too much movement attach a inline valve and turn it low. Once the sponge gets aged you'll notice the shrimp grazing on it. Food for thought (pun intended) e