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.
Lawrenceville is an unincorporated community and census-designated place (CDP) located within Lawrence Township in Mercer County, New Jersey, United States. As of the 2010 United States Census, the CDP's population was 3,887.he Lawrenceville Elementary School, one of Lawrence Township Public Schools ' four elementary schools, is located in Lawrenceville. Lawrenceville is home to the Lawrenceville School, a private boarding and day high school founded in 1810.