Leaves Yelowing and Dying

here's the rundown... biggest fan leaves started yellowing first. now smaller leaves are beginning to yellow. i'm 3-4 weeks into flowering.

several strains, all in 4" grodan cubes. top watering till runoff once every 24 hours

using dyna grow. same nute combo i've been using with success for about a year. nothing new...
1ml grow
4ml bloom
4ml cal mag
4ml protekt
5ml bud candy
.5ml h2o2

flushed last week with flora kleen. added 1/4 tsp superthrive for one watering over the weekend

600w hps about 6" from tops

tent temp of avg. 75 degrees.

buds are getting big and dense, but at this rate i'll be out of leaves before the end of the grow. any help would be greatly apreciated.

Nothing you can do now just ride it out. Next time do this, 1- every watering and feed has to go in at ph 6.5 , 2-bigger pots , 3-water more often, moisture stress= leaf drop.

agree, and maybe also add a bit more nitrogen fist two weeks of flowering ..

You water every day? Sounds like too much....yellow leaves hmmmm. I agree bigger pots and let them dry out a little. PH IS EVERYTHING and changes hourly for me. I PH every time I water.

anyone else notice he said CUBES not POTS... idk about you, but i dont think plants grow in insulation very often (what rockwool really is)

were you in dirt when you had success? because I see no micro nutes being supplemented and there wont be any in the cubes either. could be your problem

been using a ph of 5.8, same as hydro in grodan cubes without issue...

yeah, i won't make the mistake of using 4' cubes again. I'd been using 6", and they don't dry out so quickly.

think i should move the light higher?

hm, haven't used any micro's in my past cube grows... any reccomendations?