There is your answer. Ivy does really well if you clean the roots, and place them in the sump. The leaves will continue to grow outward, and will actually export the nutrients from the tank.gomezladdams;4305492;4305492 said:The idea of the lucky baboo is to just submerge the roots.Emersed plants are going to do a better job of reducing nitrates.As for submerged plants hornwort or najas will grow the fastest soaking up the most nutrients,but sometimes fall apart which would be a disaster.Java moss is pretty safe but doesnt grow as fast