Cryptocoryne Lutea leaves turning brown

[afFISHionado]

Some of the leaves of my 2 Cryptocoryne Luteas are turning brownish, yet the leaves are still very strong. Is this a sign of dying leaves or just the nature of this plant?

 

[Biggen]

Have you moved this plant recently. Crypt's go in a "shock" after being moved and can take up to a month to get back to their normal state.

 

[afFISHionado]

No, I haven't moved them. They're in the same place they were when I first planted them on June 26, 2003.