🙂 Bernd, I think it will come, not to worry.
But I will say about this species, – that from my observation, – the phoenicurus that I have seem to have a bit more ‘agressive’ temperament than many other species. It reminds me of the p.tweediei (or rubrimontis) which I also have. They are more agressive towards each other and towards the fry as well. Unless the male is guarding a nest, the females are really hidden somewhere in the back of the tank and not allowed up front.
I only see the females when the male is ‘busy’. This is not so with for example parvulus or nagyi or linkei.
Perhaps this has got to do with them being a bit more ‘difficult’ ?