Hiya I noticed alot of yellowing on my leaves with abit of rusty looking browning on some over the last 2 days along with slowed growth am wondering if anyone with more experience has any idea what the problem could be. I'm growing in bio bizz lightmix soil with mars hydro 300w eco light and greenhouse powered nutrients, am watering when it seems needed, was looking healthy to a couple of days ago so not sure what's happened, have got temps of 69-74 and humidity at 48-53%. Any help much appreciated will attach some pics, am thinking it might be nutrient burn, if so should I just flush the soil?
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