Description: 100% brand new and high quality MARIMO live moss ball suitable for cold or tropical aquariums. Great gift for your friend or loved ones to signify eternal love.... Japanese people believe Marimo will bring good luck. Therefore, they grow it in a glass bottle with just a little water & ceiling light. Marimo is a very popular plant in Japan. Negligible maintenance required. No carbon dioxide injection needed for healthy growth. Safe for shrimp. Difficulty: VERY EASY Cold water or Tropical water co2 or no co2 High or low Ideal for getting rid of pond algae and algae in the aquarium, as moss ball competes with algae for nutrients as they have similar diets. Also in your pond, drop a few in and let them flush out the nutrients that cause that ugly green water. It will also allow you to get rid of algae in a natural way. Package includes: 5PCS Giant Marimo Moss Balls (24cm)