Crinum Calamistratum Onion Plant - Easy Tropical Live Aquarium Plant You get 1 young Crinum Calamistratum aproximately 4-5 inches in height. An easy live aquarium plant specie for any freshwater aquarium Create a natural habitat in your aquarium for your fish and invertebrates Make your fish tank look natural and beautiful. Perfect for mid-size and large aquarium Provide natural resting and hiding places for your smaller fish and invertebrates Great for midsize and large aquariums