I have a WOS NLXBB that is 35 days old. Planted in 3 gallon pot and promix with extra perilite. pH is 6.6 via Accurate 8. I've been feeding AN Jungle Juice 2 part base at 2 ml/L plus 2 ml/L B52, 1 ml/L CalMagic, 1 ml/L Carboload to feed the soil microbes and 2 ml/L Rhino Skin. Was having some typical CaMg issues, so upped the CalMagic to 2 ml/L this last feeding. I always adjust the pH of the feed to 6.3. I have two marshydro old style 300's in a 2'x4'x5' tent. Light is about 24" above this plant. 4" 120cfm exhaust fan and carbon filter. Two 6" fans at bottom of tent to circulate air inside tent. All the passive intake flaps wide open. Temps have fluctuated from about 83F daytime down to 65F night. Usually runs about 79-80F average.
Yesterday, I noticed that the newest leaf tips were turning white, not like a nute burn more white than brown, and the tips were twistng like a cork screw. This is prodominatly on the main top cola, and a couple of the higher up side colas. I had given only a light 1/2 ml/L base plus 2 ml/L B52, 1 ml/L CalMagic, 1 ml/L Carboload, and 2 ml/L Rhino Skin the last feeding on the 20th because I had a little nute burn from the previous feeding so backed off this time. After this feeding, this AM I started seeing this new problem, so I went back to the normal feeding described in first paragraph. The sypmtoms seem to have gotton a little worse over the course of today. This is my first grow since adding the 2nd LED and all my plants really started eating alot more CaMg. Can these symptoms be the result of having the LED's too close, about 24 inches and side by side off the top of this plant. I have never seen bleaching, so would not recognize it. Could this be what I am seeing?
Here are pics:
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