Dunno yet, Barbie tells me that only the bottom caves will be used and they will only use the upper caves if they're really desperate.
I don't want to overload the tank and cause any unneccesary stress. I know they're territorial, so I hope I put enough space inbetween and I used plants and river rocks to add to the seperations of territory.
Right now I have one female, Nessy, with two males I just added yesterday. And I'll add my golden nugget tonight.
I think I could add one more zebra, if I could another possible female and then see what happens. I think four adults would be my limit to be honest. What does everyone else think?