Rusty T, 1st off, it is not a new problem, had the same problem last crop with a hydroponic batch of the same exact genetics, same set up with no humidity but temperate temperature's. I thought it might be a problem with mg, but I used this website and mostly my jorge cervantes growbible to diagnois it, its says its compounded by low humidity, having none is worse i would think. In severe cases it causes deficiencies in iron(which happened) and i believe thats what caused her death and we had to put her down. Flushed them very good with tap water, ph unknown(gettin a nice electronic ph meter soon. ANY SUGGESTIONS? read that the hanna ones are crappy) When the leaves have to transpire more b/c of the lack of humidity, the manganese gets locked in. Recently moved them back to a room at 78*farenheit with 50% humidity and with a good flush and some 5mg per gallon (1/2 strength)of Botanicare Liquid Karma for the foliar feeding i do once a day. They are looking way better with green growth.

OH YEAH... When i said i used name brand stuff, i meant the perlite and worm castings i mixed in with the foxfarm organic soil. My last crop was my first in soil and it worked out but we had humidity, no we dont which im worried about and am gonna fix soon. I use BOTANICARE PURE BLEND VEG plus LIQUID KARMA.

The new growth had black spots which looked just like a mn problem, most likely a toxicity of it, but the bible does not say how to treat it, i knew i had to flush but was looking for something more cause they are my pride and joy and i dont want them to suffer anymore. But ya they are looking so much better now, 2 of 3 survivied but only one really survived without much leaf loss. The ph of the soil might be a problem but i dont think so, no other deficiencies have ever plauged me and its only in the older plants and not the young ones which makes me think its a toxic buildup of Manganese which makes sense but im not sure. This is my 7th crop and never had any problems with any.

Would love some help with using the BOTANICARE PURE BLEND PRO line of nutes and the app rates, BY THE WAY.....i use it once every 2 weeks or so with them(veg+liq. karma) so i got a feeding regiment, been reading that less is more and might have over nuted some hydro organic crop i had in the past, using the soil line of botanicare now, but am switching over to SUNLEAVES BRAND INDONESIAN BAT GUANO tea diet instead of the botanicare products, do you recommend anything with that, need some help & advice on using guano's in flowing, im on the 1st wk of flowing, what should i do, also got some liquid diluted seaweed, can i use that? In a article written in high times by soma from soma seeds he says he uses brown and black seaweed extract from wks1-3, then a guano tea from wk4-7 with a 2 wk flush, what do you think about that? Your help is greatly appreciated and the good karma will be passed on to you one day. Thanks.