If your schedule allows, do it daily. I can't rememder how much your tank is scaped, but be certain that you have as much decor in there to break up line of sight. Kribs can be nasty protective (IME) and the more stuff that you have in there, the aggression of protective parents can be minimized which will help your other fishies from being chased and stressed. Hope that they keep showing and shimmying. It shouldn't be too long. Keep up the meaty foods but still give them flake also just to balance their diet.