WARNING newbie questions ahead.

A few of our Hornwort plants have grown tall enough to reach the surface
of our 55G.

-Can I cut them in half and replant them?
-Can I leave them alone, and let them bend over?

Also, what is the correct way to plant plants?
-Is it better to just push them in with your fingers or use a tool like
hemostaphs (sp?)

Thanks

55G, Flourite Substrate, DIY CO2
--
Ryan & Joanna http://users.rcn.com/dloolb/