I want a Bubbler for my 55 Gallon tank, and I want to put it in the back all the way to cover the back. But I heard that too many bubbles will stress out the fish, I have 3 damsels, and 1 tomato clown, and a valentini puffer, and I heard it can die of stress, or it can get to0 out of control in there. I also heard it is too loud, so what should I do?

The problem you'll encounter with a bubbler is excessive salt creep.