I water every 3-4 days, feeding with nutes every second watering. So probably I am not overfeeding them at all. The ph of water is 6-6.1.
The last watering before spots showed (4 days before spots) had 1 ml/l Bio-grow, 1 ml/l Bio-heaven, 1 ml/l Bio-bloom and 0.5 ml/l top max with ph of 5.9-6.
I...