and from where did you got your informations ?
it was luck to came to that forum and when i red that tread of that guy my face turned into red, because i know him very well, i´m from Germany too.
these tread was written only to make advertising for his bloody business he is doing.
you can believe me, in 2 years nobody knows about him anymore, he is an air bubble that will break soon. he is no importer, gets his fish from an other real importer here and tells a lot of lies.
i saw the tropheus musanga and there are fish with more and less red in the back fin, to show only fish with yellow back fins, they are selected. location is the same as nkonde - linangu
spoke with Peter Schuppke, autor of the Tropheus book, and these guy should have enough experience.