Thanks for the replies. I will prune the dead leaves, the tall plants are gonna be a bit funny looking though, I assume it will grow more leaves to replace the ones I cut off??
That tall plant I have, don't know what its called, is doing extremely well otherwise. I bought 1 bunch of it from the LFS and have had to cut it several times, and planted the cuttings in other locations in the tank, and I see it needs chopped off at the top again. Guess I must be doing something right!