Actual bamboo or the kind they sell in stores underwater? The ones in stores are not true bamboo and must be grown with tis leaves above the water or it will eventually rot. Real bamboo get really big and heavy, i dont think its something that can be grown normally in a tank unless your tank is really big and deep.
the stuff they sell in LFS are not true bamboo plants, Their leaves must be above water or the plant will begin to rot. The stem can be under water as long as the leaves have access to air it will be fine. Real bamboo gets to be a little thinner than a soda bottle and gets unreasonably tall and heavy. They are also not designed to grow in water, but, correct me if i am wrong, it will survive if the roots are underwater.
The bamboo sold at aquarium stores is the same bamboo sold as 'lucky bamboo' this is not real bamboo but a tropical African tree Dracaena sanderiana which lives in swamps. It should have its leaves above water so it wont rot.
Its actually related to the common houseplants the corn plant and the madgascar palm