I placed a message last year on the old Forum with allsorts of compatibilty problems in a mainly Tang tank. I have taken most of the advice and it seems to be working so far - many thanks to those who replied.

So.... the adult Tropheus and 5 inch Frontosa's have been re-homed. the main tank now has juvenile Tropheus (although some have lost spots), trio of Alunocara B. Benga 2.5 inch and a pair of Brichardi who have been in the tank (200 lt) for ages. Interestingly as soon as adults above were removed the Bridahrdi produced fry - I'd heard that if you surround Brichardi with other small fish it can trigger breeding - it did for me.

No doubt as the fish mature I'll have to re-home more - but hopefully I'll end up with a relatively happy tropheus group.