First off Let me commend you on an excelent job of bringing it back from what looks like the brink of death in the first pic.
For an id, I definately see bumps on the underside of it, so it is not a haddoni carpet nor a BTA. If you lift the edge and get a clear shot of the foot and how it is ancored it will make a definate id much easier.
What did you do feeding and lighting wise to see such a turnaround with it?