If you kept 1 male maybe 2 with 6 females with that large of a tank you could probably get away with it but I don't think you could keep 4 males and 6 females.
Best to keep an eye on them and watch closely. If you see them picking on one really keep an eye on them.
Also if the female isn't ready the male will in some instances beat her up trying to breed even though she is not ready, even kill her. So if you pull one make sure it is a male not female. That is why they are best in harems, cause if one is not ready maybe another is and the male will not pick on the same female.
If it is a male fighting with another male they will lock jaws.
The number of Tropheus is not as important as the male to female ratio. 1 to 5-6 female is ideal more females if possible
Best to keep an eye on them and watch closely. If you see them picking on one really keep an eye on them.
Also if the female isn't ready the male will in some instances beat her up trying to breed even though she is not ready, even kill her. So if you pull one make sure it is a male not female. That is why they are best in harems, cause if one is not ready maybe another is and the male will not pick on the same female.
If it is a male fighting with another male they will lock jaws.
The number of Tropheus is not as important as the male to female ratio. 1 to 5-6 female is ideal more females if possible