Strain: “Runtz” as far as I know, it’s a bag seed.
Growing 5 plants in 4x4x6 tent in 5 gallon buckets
Light: (2x) GreenGo 1200W LED
Nutrients: Fox Farm Trio
Watering: 20 cups w/ 4tbsp grow big , 4tbsp big bloom. So 4 cups per plant w/ ~ .8 tbsp of each nutrients. Water when top inch soil is dry. Feed every time I water.(switching to tiger bloom now)
Stage: Just switched to flowering couple days ago.
I just ordered 6 feminized seeds so tryin to learn The problems right now before good seeds
also
Please lmk how my 3rd plant is looking and if there’s anything I should do different
plants sprouted 10-09-2020

Bad plant no lights

Bad plant w/ light

Good plant #1

Good plant #2

Good plant #3

Good plant #4
I’m gonna agree with Monty here. I think it’s a toxicity. Usually shiny dark leaves mean it either to much nitrogen or your ph is high and you got a lock out.
I feel like it’s nutrient burn or nitrogen toxicity but not 100% sure
What’s your ppm and ph runoff? I wouldn’t think you would need to feed every time you water.
Hmmm that growth kind of looks like revegging? Do you have any light leaks or are there any pieces of equipment in the tent that emits light, such as a status light?