My clowns stressed out with excessive noise. I put my ear to the tank wall and realized my powerheads were headache inducing loud! Switch out powerheads and the noise and vibrations went away. That said, my clowns didn't eat the first 3 or 4 days after introduction. Garlic laced pellet food did help getting them to eat.
Some people might frown upon this but I stopped doing drip acclimation on fish. Sometimes moving them from bags to buckets to tanks can cause enough stress. A slight SG change won't effect the fish as much as you might think. I only do temp acclimation and have never lost a fish.