Probably because it is said that Zebras do not compete well for food. Given your other inhabitants they Zebra may not get enough food. Perhaps if you feed at night it won't be as BIG of an issue but perhaps someone with more experience will chime in! Nice pics!!!
but really after spending alot on your new zebs,there prob best in a tank on there own with maybe a few small fish,also id suggest you get more water movment in your tank as zebs really like it .!!and with all the other fish you have the condations in the tank arte not good for them,high water temp bad and fast water movement