Hi I'm new to the saltwater hobby and just got my first tank recently. It's a 12-gallon that was already set up and running for 4-months with a pair of clarkii clowns, a file fish, and a orange spot goby. Lighting is an Aqueon Optibright LED and filtration is all internal behind the tank. Any advice or suggestions would be greatly appreciated, I'm hoping to add some sort of corals to it eventually as well as some inverts!