1&2 look like crypts and 1 may have been grown emersed. The leaves on each may melt but remove the dead stuff and theroots may gro new submersed leaves. The third is hairgrass that has been grown emersed (common commercially---has seed heads) Will mainly die if left in a large clump as it will not get enough light. Spread it out in to small bunches of half dozen and it should start throwing runners.