What Is This Plant?

[xing]

Hi all

I've got a plant in my tank which has recently started to grow really quickly and requires regular trimming back. I originally thought it was H. Difformis but it the leaf structure appears different on this plant to when I've had HD in the past. A friend though it may be indian fern

 

[Sibelius]

I think your friend may well be right. (I can tell you that the fish is a congo tetra!)

 

[George Farmer]

Ceratopteris thalictroides I think.

 

[Sammie7]

Definately Watersprite AKA Ceratopteris thalictroides.

 

[frozenbarb]

how could you tell the ddifference between watersprite and wisteria??

 

[Sammie7]

It's kinda tough if your not familiar with it, I guess. I know because my water sprite looks just like that. Both water sprite and wisteria have very different leaf forms according to the environment they are in, so it all depends.
Watersprite: http/www.aquahobby.com/garden/e_cerato.php
Water wisteria: http/www.aquahobby.com/garden/e_difformis.php