I just put a plant in my tank - it looks very much like this. In the first week, all of the lower leaves fell off. The upper ones are still hanging in there. Is this due to transplant shock? Lighting is a little bit weak in my tank. I would like to install a small strip of LED's inside and underneath the hood, which would mean that the lights would be submerged all the time. Does anyone know of such a string of lights?