I bought a pair of "Julies" from a local breeder (F1's) about 2 months ago. One is signficantly larger than the other and I was told that this was the female. They got on fine for a long time, however within the last 2 weeks there has been a major falling out. The male now hides at all times with the exception of feeding time when he grabs a snack before being chased into hiding again.

I know that rock work changes can trigger this, but there haven't been any major changes. Does anybody have any suggestions to bring piece again? There are a number of juvenile Tropheus Duboisi in the tank (they don't get involved) and a trio of juvenile Peacocks and a pair of Daffodils.

Will I have to separate permanently? Would removing 1 temporarily and reintroducing work if so do I remove the male or female?