Problem with DWC

I started DCW. Using one 5gal bucket 80 liter air pump. Only have 2 buckets at this time. 1 plant out of nowhere started dying. all leaves dropped and turned brown. My Girl is hanging over bad. I keep changing the water level... on the roots and then just below the roots...? Where should the water level be?

DWC the roots are submersed in the water/nutrient mix.....maybe thats the problem...are you just using water and air? Try adding some NPK
these are clones in DWC showing you the water level anyway

Thank you. Do those clones have roots? or are they straight from the mother?

This was i think their 3rd day in there, usually this method roots in 7 to 10 days...i have an aero-cloner as well that does the job way faster with no medium, which i def reccomend, but it sprung a leak so the airpump and kitty litter pan do the trick

Thank you so much bro.