i have 6 tropheus Moorii in a 40 breeder, they are about 4in maybe a little bigger, and they are doing awesome. I started with 6 and still have the same 6. TONS of rock work though, once in awhile they mess each other up alittle but they are breeding very good for me, and they look awesome. I have been told though that my tank might be an exception to the rule.
