decay and regeneration

My Aponogeton has started to look shabby. The brown ends of the mature leaves are deteriorating, so badly I've begun trimming the ends off to prevent fouling the water. I'm guessing it's just adjusting to my water conditions, leaf loss and decay is common when aquatic plants are moved to a new environment. But I'm not too dismayed, as there are two young leaves growing quickly- bright and beautiful. Yesterday I peered in and saw another new leaf shoot that already has ruffled edges forming this morning. This plant grows quickly!

(Youngest leaf is center of this photo, the shortest, brightest green. Just behind it -low down- you can see the second new leaf forming- very narrow- and the third had not yet emerged when I took the picture).