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Imthatguytim

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Can someone please tell me what they think is going on here and how to fix it???
 

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I use fox farm grow big and big bloom together and lights on 24/7 im getting ready to change to 18/6 to try to save a little money
 
I use foxfarm grow big and big bloom together every other week with water in between and i have vivosun mh set at 250w i did have it maybe 24” above in a 24x 36 grow tent
 
I think that they are not getting magnesium...for some reason. Could be there is none in the grow medium...could be a grow medium PH problem. But that's just a guess.
 
Hey man thanx for the nfo but im thinkin it may be too much light and heat stress ive seen some pics that closely resemble what mine look like. My light was kinda low, so i moved it up and setting a timer for 18/6. See what that does. If they worsen the. I know it wasnt the light. I dont wanna go messin with all that chemical stuff and end up really killen them!
 
My gut reaction is that it is an overly rich nutrient problem. The new growth is looking very healthy while lower leaves are suffering. Sometimes plants will sacrifice older leaves by expelling the overabundance of nutrients to them in order to keep the rest of the plant healthy.
 
it's a nutrient deficiency not a too much light problem. EDIT: I wrote above "stop fertilizing". Because that is making the problem worse.
 
The soil is soaked with fertilizer. The plant cannot absorb those nutrients because of lockout. Adding more nutrients is killing the plants
 
still need more info. Temp, humidity how often and how much water type of grow medium and PH levels of your water with and without nutrients. It doesn't look like light burn especially with a 250W at 24 inches.
 
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