i thought that at first, but it all depends on what quality you are after. yeah, i harvested some grows without adjusting ph, and to be honest, they taste terrible comparatively to ones grown properly. for instance, a full dose of Fox Farms Tiger Bloom takes my tap water of 8.2 all the way down to 4.8. I watered the plants with that 4.8 ph oblivious to the fact that it destroyed the quality of my bud. leaves hardened and curled and browned and yellowed, including trim leaves deep inside the thick buds. then, that brown decomposing trim leaf in the buds caused rot and terrible taste/smell. trust me. sure, i still yielded as much as a quarter pound per plant, but the end result was not dispensary quality standards, and no medical patient would want it knowing there is properly grown bud around.