Thanks Helene and Peter for your comments.
I am pretty sure now that they are not P deissneri.
I have got a better video of the male tending to his fry, this will hopefully allow someone better than me to say what Paro this one is. I ahve removed the fry from the male today into a rearing tank of their own. The male has been an excellent father and has hardly left the cave for more than a few seconds the whole time since the eggs were laid.
[video]http://http://www.youtube.com/watch?v=6CT5tEy94AI&feature=youtu.be[/video]