pH Lower also called pH Down, Ideally your hydroponic nutrient solution pH should be maintained at 6.0 at this point, a drift of half a pH point down to 5.5 or up to 6.5 is entirely acceptable. Generally pH levels will fluctuate, so maintaining the pH between 5.5 and 6.5 is fine. A short time outside of this range should not cause any rea
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delivery took a while through post haste, a lot faster through NZ post