Crinum Calamistratum (Crazy Hardy Aquarium Plant) is available for sale! Shop Now! If you want a unique looking plant for contrast in your tank, Crinum Calamistratum is that plant. It has ridged kinda skinny ruffled leaves on it. I have kept this plant for a number of years and have even debated just keeping it alone all by its self. It does take a second to establish itself in the aquarium. Crinum Calamistratum might even have one inch sections on the tips of its leaves turn yellow in the move.