I'm leaving town for 14 days on vacation. I'm not sure what to do about lighting while I'm gone. I don't have a timer for my light and I don't want to leave my fish without light for that long of a period. I do have a fluorescent light on the ceiling above my tank. It's an old light and its not very bright. There's plenty of places for my fish to hide in the tank that would provide it with some "dark time." Would it be ok to leave that on for the entire time?