[Coelacanth]

Actually, a 12-hour photoperiod, while more than I'd recommend, is still right at the highest end of acceptable. You do run the risk of an algae bloom, but algae is more dependent on the level of phosphates and nitrates in the tank than on light. I certainly don't think you'd kill your fish within a couple of days just by leaving the lights on for 12 hours. Some people even say 14 hours is OK, depending on what you keep in the tank. Me, I'd recommend about an 8 hour MH light period, with a 30-60 minute actinic period at beginning and end of the day.

Also, for the wish list -- I'd love to see the rare and beautiful candy basslet!