I'm having the worst problem with the plants in my 29. They will stay all nice and healthy until a certain height and then those leaves will die off and it will grow new ones. However a 29 is fairly tall and it's starting to bug me that I can't get them taller.
So I'm looking for...
a) Plants that tend to grow tall (I'll bite the bullet and just ship them in)
b) some ideas as to why this keeps happening to plants that would supposedly get bigger.