Should I not remove all the fish from the tank at once so as not to disturb bio load?

When first putting fish in a tank, we all know you are supposed to put a little in at a time so that the bio load isn't disturbed by a huge amount of fish. I am removing 10 zebra danios from my 55 gallon community tank that also has cardinal tetras, sordtails, ottos, kuhlis, a pearl gourami. I was wondering, can i take the danios out all at once or should I do it in like three's so as not to mess up the bio load in an opposite effect? Or does it not work that way??