Sorry this post is prolly way behind when you first posted, but I had the SAME problem, I had the broadleaf sword plant and the leaves turned kinda borwnish and I clipped them and the long narrow ones have grow in place and the plant has totally flourished and is healthy as can be, just not what I purchased.. *shurgs*
That's exactly what I mean. My plants are completely healthy, but the leaves changed shape, and no one can explain why they do that.
i explained why in the first page. they change leaves from emersed growth into submerged. swords are grown above water at the plant farms then they have to change over to emersed when they go into the tank. thats why the melt and fall apart then come back
