Mmmm. Are you able to take a picture of your candling? Id like to see if possible.
You can try tapping gently with your finger nail on the shell to see if you can get a chirp check really carefully to see if you can see an internal pip in the aircell any that have pipped internally should not be put in water.
If you want to check 1 i would say go for it. If you get no movement in the water then you could try opening 1 egg just into the air cell to see if there is an internal pip. (Only if it failed the water test though.)
If the chick still looks alive or has internally pipped and you can see its beak moving you can put it back in the incubator but it will likely need help to hatch when the time comes.
If it fails the water test though its most likely already dead.
Remember Warm water for the test. And for now just try 1 egg.