Maybe a crazy question

[rmay6850]

I have an Apex Dos attached below my DT in the cabinet set up to do auto water changes several nights a week from 1am to 7am. Anyone using this unit knows it can be quite noisy when it runs. Now to my question, do you think the on and off noise could effect the fish by stressing them during the night? Not sure how they or if they might pick up on noise or even vibration possibly???
Would be great to hear your thoughts

 

[Reefing_addiction]

You should record your tank and inhabitants and see their reaction to the noise/vibrations.

 

[vetteguy53081]

I doubt it can have an effect on the fish.
i have heard of DOS noise yet mine is quiet .