Thats not true, I have a single pump making bubbles in 7 totes and they do fine, so does the Kratky methods as Sub has proven. What will kill your plants every time in no air gap, roots got no gills.

You need to let an indica go a couple weeks past ripe to 70% amber and dont drink anything with caffeine in it after 6 hours or more before bed time. My body clock is on an 30 day so I use sleep aid combo of Markers Mark and Weed