That's kind of ironic because my group of 9 silver dollars (hey, they're tetras...just bigguns!) go absolutely BONKERS when I turn the tank lights ON! They'll be in a nice calm school swimming around happily, and then once the lights come on, they break out of their school, dart around frantically, bash into things and each other until I turn the lights off. Not saying they like it dark, but I keep the living room dimly lit to conserve energy and keep the tank lights off most of the time. Maybe I could try to keep the lights on full time and have them acclimate, but I'm afraid in the time it takes to do that, I will have casualties. So....it's lights out for now.

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"Yes, Sir, you can talk to the shift supervisor, but I don't think it will help. Oh ... did I mention that I am the shift supervisor?"