SpongeBob’s Pineapple House, Squidward’s Island House and Krusty Krab. It joins. Your aquarium will immediately present a colorful sea world. The decorations are made of high-quality and reliable resin. Rinse them with clean water before adding them to the aquarium. If you are concerned about affecting your water quality, you can soak in water for a day and work for a long time in freshwater and saltwater, the color will not fall off and the color will not fade. Our aquarium decorations are flat bottom and can be placed anywhere. There are no sharp ridges on the edge and won’t damage the fins, it’s a place for fish to play and hide. A great decoration for fans of the world of Spongebob to place. Whether for children or friends, this is a great gift.