Penn-Plax - Officially licensed Nickelodeon SpongeBob's Pineapple House Aquarium Ornament makes a great addition to all home aquariums. This ornament is inspected with your fish’s safety in mind; material is safe for both freshwater and saltwater aquariums. Additionally, the ornament has a sturdy base so you don’t need to worry about it floating around once you place it underwater. Simply wipe down and rinse off the ornament with warm water when you are cleaning out your tank. Never use soap, as the residual soap particles can harm your fish. Perfect for adults and children! This fun aquarium decoration will add magic and color instantly to your tank! Most small and medium sized fish can fit inside this ornament, allowing them to swim in and around it, which helps reduce fish boredom. Measures approximately 7.25” (H) x 4.25” (Dia). It will fit easily in almost any fish tank sitting at home. It’s designed to be the perfect accent to any aquarium, regardless of size. Get creative!