Came into work this morning to see the water level about 2 inches low in my work tank (44 Pent). Overflow failed, water spilled onto a cord, shorted out, tripped the braker. B11 kicked on and kept everything alive. NICE. Got everything restarted, only losses appear to be a few Xenia at the top of the tank. I had no idea that Xenia would dry up to become almost nothing....paper thin...amazing.