Penn-Plax SpongeBob SquarePants Pineapple Home Aquarium Decor. From the creative minds at Nickelodeon bring SpongeBob s famous pineapple house that’s located on 124 Conch Street Bikini Bottom to your home! This small sized 5 inch officially licensed aquarium ornament is a great addition to aquariums and fish tanks! The resin material used is safe for both freshwater and saltwater aquariums. Each decoration has a sturdy base there’s no need to worry about it floating around once you place it underwater.