DWC question. Please help

I have one simple question about DWC system over night.

should i keep the Air pump on during the night cycle? or it can be turned off as the lamps. does not still water during night drown the roots?

thank you in advance

Let it run all the time, never turn it off. More air the better.

Always on or it drowns.

And make sure you run a high volume air pump... I see too many hydro people running them 11 dollar walmart pumps.. Big Mistake. Good luck

Damn, maybe thats why i cant get the three pound harvest. Ive been using my $11 walmart pumps for years. Ive got to stop those big mistakes.