its hard to tell from the picture; my thoughts are that a.) its some sort of algae growing on it. or b.) the actual plant is somehow deteriorating.
i would remove it from the tank and try washing it off. if the plants starts falling apart, i'd keep it out of the tank for sure. but if the fuzzy stuff just comes off then it should be alright to put back in. just keep up with water changes and things : ]
i would remove it from the tank and try washing it off. if the plants starts falling apart, i'd keep it out of the tank for sure. but if the fuzzy stuff just comes off then it should be alright to put back in. just keep up with water changes and things : ]