Yeah, Vals and swords are planted in the substrate. Anubias and java ferns not. You can tie them to a rock or DW to look like they're planted though!
Cut leaves that aren't mostly whole like this one. Cut as close to the base as you can with sharp scissors.
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Or anything that looks melted like the curvy one here. You can cut just below the melted spot, not nec. The whole leaf unless it all looks sad.
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I personally wouldn't worry about the frayed edges of the vals.