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Help rapid yellowing of leaves

ok i'm using a homebox xl with 600 watt mh conversion bulb temps are 70 to 75 water temps are at 69 there in a home made dwc system wrap with brown and like 6 rolls of duct tape I pre wash the hydroton then condition it with a little ph down I got seed's from greenhouse seed big bang fem germ all 10 put in a humidity dome with heat mat for 3 days under 60 watt of floros 3 rooted in rockwool stater cubes which were pre soaked in less than 3 days then 2 days later the rest rooted now its day 30 they been in my tent under the big light for 5 days and there on the second set of leaves some on the 3rd set they were nice and green when they went in 2 days 2plants to yellow so I change the RES and put the nutes up to 400 ppm they were at 300 and the ph stays between 5.5 and 6.2 I still have two plants that are perfect but there starting to yellow this my first time growing the nutes i'm using flora nova grow please help
 
M

mexilandrace

word of advice, when you write it out like that its hard for people to read and most will just skip over it
 

stinkyattic

her dankness
Veteran
Guilty as charged... I gave up after the second line...

Punctuation is AWESOME.
The actual troubleshooting form, filled out, is awesomer.
Punctuation, the form, and pictures of your plants and the room they call home... THAT is most awesomest of all.
 

MynameStitch

Dr. Doolittle
Mentor
Veteran
Oh god, I hope you don't have a bad homebox..... is the leaves yellowing on the newer growth like on the top of the plant, or yellowing on the bottom to middle leaves? This problem started when you got them in the box right?
 
it's bottom growth with brown spot on the leave so I thought it was a ph problem so I check my ph 5 times a day and I think I was user feeding them
 

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