Hello, I have a question Peter… I such a cases could be a good solution to put large numbers of this mixed fishes in to a quite big tank with a big numbers of caves. And carfully observe them and allow them to choose the pairs… Then could we be shure that male of P.sumatranus will choose female from the same species..? or any female will be intrested by him..? In first example we could seperate this pair and we could be sure that we have a pair of P.sumatranus…and other species…
Marcin Chyła