Oxygenating Hornwort (Ceratophyllum demersum) - 6 Plants
Submerged plant with whorls of delicate forked leaves on slender stems.   Excellent oxygenator and algae fighter.   Hornwort can be floated  in the pond bottom or planted in a shallow pot of gravel to  anchor in desired location in pond.  Use in ponds and  tub gardens for algae control.  Benefits fish by providing shelter from predators, oxygen and algae control.  Non invasive.  Hardy to zone 5.  Plant in full sun or part shade in water 1'-10' deep.