Medium Moss Balls, Aquarium Decor for Aquatic Pets, 3 Balls Per Pack. An Heirloom Gift --- Marimos make an excellent present for your friend or loved ones as they symbolize everlasting love. Versatile Marimos --- Marimos are a favorite toy for tropical fish like bettas and freshwater shrimp. They love to play with marimos, and some use them as a comfortable hiding spot. Less Aquarium Maintenance with Marimos --- Marimos help improve the water quality in your aquarium and create a favorable atmosphere for your valuable aquatic pets. Plus, taking care of an aquatic pet has never been easier. They can be placed anywhere in an aquarium, a glass, or even a glass of tap water! Enhances Your Aquarium and is Inexpensive --- LUFFY deliberately uses no color-changing agents in the moss balls to give them a stronger color. Since we sell genuine marimos, inherent \"imperfections\" like an asymmetrical shape or weaker color do not mean they are damaged. However, moss balls significantly enhance the beauty of the aquarium. A little bright, cold water is enough.