Which string on Rotala

[jbueno]

Mexicana? I receive this one with a whole bunch of other Rotala indica but I don't know what it is. I think it's Rotala Mexicana that what it like on google images but I'm not quite sure little help with this all I'm askin? My LFS isn't sure what it is either.... The plant in question is behind the indica...

 

[Niccobacci11]

it kind of looks like anacharis. but the reddish tip on it makes me think either a nutrient deficiency possibly NO3.
I can see that it could also be mexicana, that would explain the reddish tip, but the slitely transparent leaves make me think otherwise.
If it is possible to get a better picture that would be helpful.

 

[Rivercats]

That single stem is anacharis.