Crinum calamistratum is a very graceful bulbous plant with dark-green, very narrow leaves. It forms smaller bulbs than the other Crinum species, and demands more light. In the aquarium plants that are thriving form a number of small bulbs. It is not eaten by herbivorous fish. It can also be used in brackish aquariums with low salt concentrations. [TROPICA]
i have a couple of these plants myself. they are slow growers but the growth rate will increase with a little bit more light and ofcourse some Excel. Mine do well, my Distichodus Affinis and Uaru leave it alone. They will tear up anubias though!
Personally I am having great trouble with this plant. I am using a nutrient-rich substrate, lighting around 50 PAR, root tabs for fertilization, and daily doses liquid carbon. The problem I am having is that the plant keeps rotting at the roots. It is not staying firmly rooted and is easily knocked over with the slightest disturbance of my hand. The roots smell strongly of sewage, and I have cut away rotten plant matter and replanted several times. Each replanting seems to stunt the growth of the plant, but it also seems necessary given that the roots continue to decompose under the substrate. I would like to keep this beautiful plant from dying but I'm not sure what I'm doing wrong. Update: I had success with cutting off the parts of the bulb that were rotting. I had to cut off a significant portion, which I was sure would kill the plant. However, the plant has grown a significant root structure since then and is no longer rotting.