Crypts are doing good, I put 1 big one and a small one in the killie tank and the other bigger one in here, it's in the middle back left corner next to the taller becketti/mystery ones at the back. They do have nice leaves. I think they will melt as most of my posted ones have at some point, but fingers crossed they don't disappear completely.
Am trying to think of other plants that might go well in here as another layer around the semi circle but can't think of anything other than crypts and dwarf chain sword which I don't really want to use. More crypts would probably be nice - most plants look nice en masse.