Don't use chaching or beastie with anything else. Use them as a ONCE a week stand alone feed.
Cha-Ching is your finisher feed. It's high in K, so you want to use it at week 7 and 8 to stack on resin and bring out the terps.
Beastie is your bud growth booster. You want to use this about week 4...
Opening the bag. There might be a few flying around at first, but they die off pretty quickly if you let the soil dry out.
My bags have always had moisture in them though, so it's to be expected for gnats to appear. They're not a threat to your plants anyways
Has nothing to do with the roots.
You're getting better flavors because of the longer dry period by hanging a full plant. The longer the dry period, the more chlorophyll gets removed, which in turn makes the cure period shorter.
Let it grow longer.
I wouldn't recommend chopping early because trichs still mature during dry and cure. Early chops still result in very high thc content, the downside it doesn't taste as good
UVA does nothing for plants.
UVB (when used correctly) increases trichrome production. UVB hurts plants, it's not good for them. So when they get hit with high amounts of UV, their response is to produce more resin in order to protect themselves from the light.
Human skin does the same thing...