Aquatic Arts 5 B Grade Giant Marimo Moss Balls Aquatic Arts is the best rated brand of Marimo on Amazon! Note that our Giant Marimo Balls are 2-2.5 inches, while others call 1.5 inch marimo "Giant". Extremely easy to take care of. Keep them in any freshwater aquarium, terrarium, simple jar or glass vase. They can even live in tap water with a biweekly water change. No need for special lighting. Unique home decor ideas that make great indoor decorations. More low maintenance than other live plants like bonsai trees. These natural decorative plants also look great as interior centerpieces. Get creative with them. Build your own terrarium kit, use them as gifts, teach children how to keep them as pets, decorate your apartment, office, or patio with them. Our Marimo Moss Balls are extremely dense and guaranteed to be healthy. These aquatic plants grow slowly, so the moss balls you receive from us are 8 to 15 years old!