PH up and PH down wont kill your soil bacteria, maybe some of them, but that stuff is incredibly diluted, I use like 2 drops per every liter. Organic fertilizers are made specially to lower your ph too, thats why you usually dont need to touch anything unless youre making your own supersoil. Iguana Juice is 100% organic and it has acidity regulators, its from the PH perfect category they have, like sensi grow and conoisseur ph perfect, even tho these 2 last are not organic, maybe thats why you think that you dont need to take care of your ph with organics? Mineral fertilizers are indeed absorved quicker and rely more on ph, but I dont think organics dont rely on ph, Advanced Nutrients puts extra effort on lowering the ph of your water, wether you use full organic, mineral or bio-mineral.