Is it a bad thing when the "stalk" or base of the Xenia gets thinner than it was a month ago? I bought it on a tonga branch, and as it has grown it has attatched itself to the rock above/next to it. It is in a light current, all my water levels are right, everything is growing, including the Xenia. Nothing is sick, I have good algae, and the Xenia pulsates and takes in the plankton when I turn off the power head and feed it. The top/tips looks great, but only the base has gotten thinner while the stalks have gotten longer and are multiplyig quickly. Is there anything wrong with it? Thank you so much in advance.