Trim away any browned, yellow leaves. Trim them as close to the root as possible. Whatever u leave behind will detiorate and have to be trimmed again. Crypts are great plants. They will "melt" at first, don't be alarmed as the plant is adjusting to ur tank parameters. Mine have melted a couple of times and now they're almost 6". Crypts do well in just about any light requirements, just so they are in light and not hiding in the corner.