Aquascaping categories--my own take on it. | AquaScaping World Forum
Surface aquarium plants are particularly useful: They leach nitrates (fish waste) directly from the water column via their beautiful trailing root systems, and they provide a sense of safety and shelter for your fish. But beware placing them in aquariums with a H.O.B. filter, as the strong downward current created by the water flow will continually drag surface plants down, damaging their roots and eventually killing them.