Lacking nutrients. Everything I see I had with mine except not hydro and slowly started bumping up certain nutes, especially calmag. Started with 4ml to a gallon and got to 8ml before I started seeing improvements. Took away a little nitrogen to add a little more phosphorus. I know every plant is different, that’s just what I had to figure out. Rabbit hole of videos galore till your sick of them , then watch more. I would probably know more if I didn’t sleep through High school keeping a B/C average to stay on the surf team to do as little as possible. Regrets in life over 20yrs later haha.