Deficiency?? Iron? Zinc? Sulfur? Nute lock?

My girls are two months old. I've had them growing under a blue spectrum 1000W bulb with great results. I'm indoors within a 4 x 8 tent; light warrior/ocean forest soil in 3-5 gallon pots, inline fan bringing fresh air in the bottom, hot air releasing out the top - temps ranging 60-75, humidity 50 - 60%. So far they've grown great and looked awesome and healthy the whole time. I just switched over to 12/12 HPS after 24 hours of dark to start flowering.

When I switched my lights from MH to HPS and turned them on, I noticed my plants looked yellow. The new growth looks yellow beginning at the stem and slowly fading to the front of the leaf. I've seen many plant deficiency sites which correlate similar symptoms with iron, zinc, and sulfur deficiency - I've even seen nute lock from incorrect ph, etc look similar (online).

I bubble in a 5 gal reservoir - filtered water. I like to let the top inch of soil dry out before watering, at least. I check my ph meters accuracy before each water. I check ph after I add nutes. I raise the ph with baking soda and lower it with lemon 6 - 6.5. I've been using Earth Juice grow, vital fish, sea blast grow, food grade h202, hygrozyme, and compost tea interchangeably, weekly. Up until flowering I foliar sprayed with milk, h202, cal mag, iron zinc, foliage plus, and clear water, also interchangeably/weekly.

2 waterings ago I decided to give my plants a little earth juice bloom and molasses to help them transition into flower. However, I used diluted ratios of the recommended dose as to not shock them. Maybe it did anyway?? After that I watered once with h202 water (which I have done the entire grow, been fine so far) And now they look bad all of the sudden. So…wtf have I done? nute lock? Deficiency?

I've flushed my plants once since I've had them. I read it wasn't crucial to do during transition but now maybe I'm thinking it's the way to go?

Someone please help!!
!

Sens -
Go back to the main "Plant Problems" page. See the stickied threads on the top? Scroll down to the 5th one.

https://www.rollitup.org/t/posting-pictures-with-an-hps-on-please-turn-them-off-for-pics.499945/

That post has been stickied specifically because nobody can tell what the leaves look like under that orange cast. Round up the brightest lights you have in the house and stick them in the tent with your camera. Or drag the plant out into a sunny spot. You have to provide some source of bright light that's as close as possible to natural light. If your camera has flash, that might work but you probably won't be happy with the results. Hard for the camera to focus, dark shadows and overexposure at the same time, etc. If you jam some bright lights in the tent and use the flash, that might work.

You wrote: "When I switched my lights from MH to HPS and turned them on, I noticed my plants looked yellow." Well, of course they did. Do you mean they've continued to look worse since then??

Thanks so much, Mellodrama

Guess I was just in a panic when I saw them with HPS lights on and forgot to use another light source to double check. I didn't know HPS lights made them look yellow (my first indoor experiment) I was assuming going from the blue spectrum to the red spectrum would look a little different, but the new growth looks kinda strange to me.

I actually have another room under HPS in it's 3rd week of flower that's doing the same thing but worse, and it's affecting bud development. Half of the crop has the white hairs that look fine and the other half looks burnt and dead. I guess that's why I'm worried. I'll try to explain more and post pics later.

sorry for another redundant HPS photo, but here is a comparison of my plants during last day of veg and first day of flower.

I'm growing sweet tooth #3 and had the same problems recently. It was a micro def. I had some EJ microblast and foliar sprayed twice a day for two days, then at the next watering 1tsp in a gallon of rain water. The problem cleared up pretty fast. Hope that helps some.