Aquatic Arts 25 GIANT Marimo Moss Balls (1.5-2.5 inches, 8-15 years old) - Over 5x AS LARGE AS NANO MARIMO! - Great for fish, shrimp, and snails All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners! Does not need special or high intensity lighting, and can be kept in any freshwater aquarium. The moss grows slowly, so these moss balls are 8 to 15 years old! Extremely dense moss - bright green and healthy.