Hey Ojh, try feeding every 8-10 hours, just about 10-12 ozs, I'm only in 2gallon pots, so you might need a little more, but not much.
All I do is water around the stalk every 8-10hours, about 10ozs, and I keep notes how much nutrients I'm using, an I keep increasing a little every time till I see tip burn, but I ain't seen none yet, and I'm a good bit over what Advanced Nutrients say to use. But every time I look at them, they are loving what they are getting, Leaves erect, pointing up. So I ain't changing sh-t. If it ain't broke, lol. I promise, yours will grow better-faster, if you try that way. Good luck, it's just a little more work, but you want be walking in to look at droopy ass, plants either.