The length of time to keep your lights will depend on the type of aquarium you have running. For a freshwater tank with just fish there really is no set time. Anywhere from 1-12 hours per day will be fine. If the tank is in an area where it gets lots of indirect sunlight or simply is a bright room you can keep the lights on for less time. If it is a very dark room you can keep the lights on longer. This will also hold true for a fish only saltwater tank.
Lawrence County, Illinois. Lawrence County is the easternmost county in the U.S. state of Illinois (excluding water boundaries). According to the 2010 census, it has a population of 16,833. Its county seat is Lawrenceville. Contents.
Sponsored Topics. Princeville is a village in Peoria County, Illinois, United States. The population was 1,621 at the 2000 census. It is part of the Peoria, Illinois Metropolitan Statistical Area. Princeville is located at 40Â°55â²54â³N 89Â°45â²21â³W / 40.93167Â°N 89.75583Â°W / 40.93167; -89.75583 (40.931573, -89.755701).