I had some AOG's and pinks that bleached after a tank move.Place your zoas in good flow,and under lighting.Now dont place them under the lights to were they get burnt. Place them in a place where they get good light but not 100% light. U will notice they will come back around.when u do...move them under the lights 100% and they should be back to normal. I hope this makes since and works for u...i did for me...and mine went to WHITE...and they look normal now.Good Luck