I have never heard of giving chickens bleach...please don't do that again.
I'd also stop ALL the extras and only give them plain fresh water and a balanced complete poultry feed. No ACV, no extra anything.
It's impossible for DE to "work" in a wet environment to kill anything.
It's worthless.
You newest/youngest flock...can you go watch them now and get a few clear photos of fresh poop?