What's going on with my +speed

Nonamemicgee

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Growth is still fine as I can see but this happend after I began using 2ml per ltr instead of 1 of coco sensi bloom ph perfect. What's going on? Leaf curling also. Under a 400 watt mh on 24.7 bout 20 inches away. Grown in coco

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:toke:- sorry for the wait bud,... Ok, this looks like a bit of K toxicity,.. for sure this started after you upped the feed rate, no symptoms before? I ask to see if the lights are a bit too hot/intense even at 20",...iI see some edge rolling going on too; what's the T and RH% in there?
 
Temps were high 80s for the week but fall is setting in and it will stay in the 70-85 range rh is 50-60. But I've seem to have got it worked out with this plant now I'm having trouble with my Brooklyn sunrise if u can look at my other post
 
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