Nice to see the wall of text is being read!
The Root Stim is not to stimulate new root growth, that would be difficult to achieve at this stage! The product i'm using is Canna BioRhizotonic at 0.5ml/L. It smells like it has come straight off a farm. I'm using it for its B Vitamins (stress relieving properties). It's actually marketed as a root stimulator and stress reliever, and as of yesterday, i have identified SPRINGTAILS in my pots. If they are causing any damage the B Vitamins will help. This could explain a number of things though. However their numbers right now are low, very low. Maybe 1-5 per pot. I have a feeling they've come about since i've upped my watering. Up until week 4 of flowering i didn't drench the pots, fed each plant roughly 2L at a time, now it's more like 3L each, in 6L pots, and more frequently. Will back off again as i know they like those overly moist soils and keep an eye on the run off (which is where i saw them, not floating to the surface of the pots). I was more focussed on keeping the soil nice and wet for the microbiology going on down there, went a bit overboard maybe. They COULD have just come in the peat... the plants never gave me any clear signs of being overwatered...
Thanks man, what can i say.... stoners are creative people! This is one of two dream set ups, the other requires a lot more space (a whole house) and a lot more money (a whole pile)
I can't wait to see how the next run turns out!