I had this or have this , it got worse everything yellowed on me and I fed a bio bizz flower food which dropped the ph to 5.5 on water
turns out the ph of the soil in the top was fine the middle n bottom was 7.8 ,feeding lower ph helped also citric acid for one it is a chelate of nutrients and 2nd bubbles off any carbonates raising ph
i am end of flower I saved 3/4 the plant while the rest got spider mite
it’s locked down to the 1 plant with high ph soil the other plants are clear
matches a chart I was shown here few post ago to be honest lol
the holes in buckets , I have?plans for like 20 holes round my net pot …do I need to do them up the sides too ??