Dealing with partially brown sword plant leaves

[boomer]

I'd recommend giving those leaves a break for now. Get some substrate tabs in close to the plant crowns to help them establish a good root system. Move them into their permanent spot sooner rather than later, so they can settle in. Once you start seeing new leaves popping out from the center of the crown, you can reassess the older leaves that are browning and decide whether to trim them off. As I mentioned before, Echinodorus is pretty clever about transferring nutrients from older, dying leaves to new growth, as long as the stem at the crown is still intact. If the leaf comes away easily with a slight tug, it's probably safe to remove it.

[CasCat]

I'd also like to add that the leaves appear to be emersed growth of sword leaves, so they'll naturally change over time. As the plant adapts, new leaves will start growing in, longer and narrower, while these current ones will eventually fade away.

[boomer]

Actually, I'm with boomer on this one, thanks for pointing that out, I'd forgotten about the way swords transfer nutrients from older leaves to new growth.

[oldraider]

I've been doing the same, leaving old leaves on till they're almost gone, seems to work for me.