Help I think Nitrogen Deficiency

I referred to the Jorge Cervantes bible which I bought and I believe this is a nitrogen deficiency.

I'm using Advance Nutrients and looked on the website and can't figure out which nutrient to add for Nitrogen deficiency.

1st question confirm if this is Nitrogen deficiency?

2nd question If your familiar with Advance Nutrients what to add to treat?

They don't open for another couple hours.

Thanks

maybe a bit overwatered.

they look really good to me!

I just spoke to Roy at AN and he said to flush the system for 2 watering cycles PH qadjusted RO water. Roy called the problem nutrient lock. I'm off to Home depot to pick up another res.

Flushed the system with 5.6 PH RO water at the 2PM feeding. The results were amazing. I wish I had my camera with me. As soon as the table started draining I could the green rushing through the viens of the plant. I was shocked at how quickly it happened. I didn't want to move to get my camera and miss it it was so fast. I believe I will do a fresh water flush every week before my res cleanings.

By 12 PM the plants in the picture I posted this morning were almost all yellow.

are you kidding me those plants are beautiful, if you want better than that itll be perfection, you should see my grow, them fools are jacked up

damn you must have caught that yellowing FAST, they dont look hardly yellow at all by those pictures

I check the plants 3 or 4 times a day.

If I'm going to spend the money on all the equipment, electric, water and take the risk growing I want to have a great crop with really high yield.

There is definetly a learning curve that's for sure.

Had I waited another day to react I would have had a serious problem. That's why I check them so frequently.

Happy growing