high pH buffering capacity in a nutrient is an advantage. It ensures
minimal initial and ongoing pH adjustments are required, especially where
high alkalinity make-up water is used. This feature is extremely
because a lack of pH control is a common cause of nutrient failure and
plumbing blockages (Fig 7.5).
a rule-of-thumb, a high
quality ‘bloom’ formulation should require
virtually no initial pH adjustment, even when used with high alkalinity
water. This means that after dilution with a range of make-up waters, the
pH should always fall well within the range 4.5 to 6.5. However, many
brands fail to offer this feature.