I think I see your problem. I seen lots of little white spots looked very sim to spidermite damage but it's only mist from whatever you spraying your plants with, stop wetting your plants, too much moisture, unless it's for that very purpose the roots feed from your feeds not the plant itself. Getting it wet will lead to droplet burn/increased risk of mold and so on and on and on. Watering seems fine looking through your soil. I'm putting it down to you using a spray bottle and spraying your plants, you don't do that, unless a spray that specialise in foiler sprays like green buzz liquids and other nutes/water goes in the soil. Happy growing