I've encountered a devastating condition of my plants that I can't nail down the cause. They stop growing and drinking water about 1 week after exposure to my room. First the leaves droop and then all the stems turn purple and leaves yellow with purple veins. From what I can tell, the plant is not using any nitrogen. I can flower a plant that is already mature but it doesn't get any bigger during flowering. Even if I start with a healthy plant from a friend, the drooping and yellowing begin in fresh soil with a very mild dose of ferts. I use botanicare and an organic soil so I'm sure it's not over fertilization. I check the ph of the water constantly and always feed at 6.5. The strange thing is that after a couple of weeks of exposure, the ph of the soil is up to 7.4 or higher. Even when flushing with a low ph water like 3.0 after a couple of days, the ph is right back up there. I've concluded that maybe there is something growing in the water/soil, so I started purifying all my water and adding either hygrozyme or companion to combat any bacterial growth with little to no success. I've also flushed with a high concentrate of 29% hydrogen peroxide. The only other thing that I've read about is a fungal infection, but the pics I saw didn't quite look the same. Is there anything I've missed? Like something else airborne that is reinfecting the plants? I'll include some pics. The greener ones are early stage and the yellow ones are obviously later. Any help would be great!
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