What moss is this?

[cosmoleo]

I bought weeping moss, or so I thought. It's been about 3 weeks since I put it in the tank. They seem to be reaching up rather than weeping. What was I sold? TIA

 

[ADsnail]

It looks like Stringy Moss, Leptodictyum riparium. It's similar to good old Java moss, but is grows faster and denser. It's an easy plant that gives good shelter and will need trimming if it gets too big.