You mentioned you noticed this after a water change..
Have you changed the water in other tanks since this happened?
Did you change the water in other tanks the same day?
What is the pH of your water? Let me know if its normal.
Are the clear leaves 'rigid', or limp like they are turning to mush?
How long after the water change did the plants start to suffer?
Without these answers, I suspect a nutrient deficiency- definitely a macro nutrient.
Even the dying plants may still be growing, and sacrificing old leaves to produce new ones.
Trim all damaged leaves, and for now, feed your fish slightly more. (More fish poop equals more nutrients.)
I also suggest root tabs, but if you have access to clay (such as in your yard), you can make your own.