I have some questions about lighting for nocturnal octos. I've read the merc threads, and I know D does red lights 27-7 (is that right?). Are the lighting needs the same for all n'octos? "Thing 2" (IDs right now are macropus or boki ) in the 55 gal. is nocturnal for sure, and absolutely NOT a merc, should I do red lights 24-7 there too, or just at night? Why would it care about lights during the day if it is sleeping? The merc peeks out at me all day from it's den, so I can see keeping lights on for it in the day if it is awake. "Thing 2" sleeps under a rock all day. Also, does it make a difference if the lights are regular actinic aquarium lights filtered through vellum, or are red LEDs better? My husband brought this up to me, it may be he'd like an excuse to visit the hardware store, but who wouldn't?