I use weaker sources of nitrogen but more frequently pretty much just fish emulsion in my teas and I top dress with worm castings and alfalfa meal. I think the majority of the wood is actually composted the wood that seems like it might be fresher is lighter and has floated up to the top after some heavy watering with the perlite so I just scoop it off. The plants other than that one clone are actually doing great growing very fast now just topped em all yesterday just a lil bit of warped growth because they aren't sure whether to flower or veg ( weirdly cool n cloudy for NorCal summer atm) i think the problem was ph issues do to Poor drainage on the one bin. Think I'll be ok in this soil I've used lots of ffof in the past and that has lots of composted wood in it and works great for outdoor. Just gotta keep em well fed. I'd rather not stress em too the bigger one from seed is doing so well it's a problem getting way too tall already ( nice and dark too) I've been topping and super cropping the hell out of it so I think the nitrogen lockout might not be an issue. Ill keep you guys updated on the problem clone tho hopefully she starts bouncin back soon ,got a soil ph test kit I'm gonna use tomorrow to check how much of what nutes are in the soil as well