Hello. I’m from Russia, ru-community couldn’t help me with this problem. Hope to find help here! I use google translator, I apologize in advance for errors in the syntax.
I hope for help, because my hands fall already.
From the beginning, from the sprout, yellow spots began to appear on the leaves of one plant, which then blackened, spread throughout the leaf and the leaf naturally rotted. Please note that this problem started from the beginning, when there were still no fertilizers, there were no problems with temperature and humidity, but the substrate was the cheapest land from the store.
I watched further, the lower leaves died off, the disease climbed higher, onto initially healthy green leaves. Symptoms are similar to a lack of calcium, so I began to pour in pH 7.0, water pH 5.2 came out. He also began to give GHE fertilizers, but in smaller quantities, so as not to additionally injure.
At the last watering I saw a small white bug in the ground! Who can it be and can it be the culprit of the problems ??
On the second plant, everything was ok from the beginning, but now there are similar symptoms, maybe still the problem is in pests, and not in nutrients? This is the second plant
I’m using 250W High-Pressure Sodium Lamp.
I said, the problem started before using nutrients. The last time I used 0,5 ml FloraMicro, 0,5 ml FloraGro and 2 ml FloraBloom in five liters of water in each plant.
I water my plants once a 3-4 days. They are growing in 23 liter grow bags
@howpim so 7 gallon bags correct? I’m not really sure what the problem is it seems to be a combination, they just look sick in general, just my personal opinion try to grow outside next grow if possible, but let me tag some pros To help @Mrcrabs @PurpNGold74 @imSICKkid @Missiles
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Welcome to ilgm my friend, from what you’ve posted it looks to me that you have fungus gnats in yours soil and your ph is out of line , being it’s at 5.2, coming out. What I use for fungus gnats is insects frass,it contains Chitin, which kills root feeding nematodes, fungus gnats and more. It will not kill beneficial insects. I grown more on the organic side so my methods are a little different, don’t know if your able to source insects frass in Russia but if not there are other ways, give it sometime to let others chime in and se what they think, Good luck buddy
let me see if someone can help 
