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Originally Posted by RJSimoneaux  May I ask why it is important to add before lights on? And how soon before lights on is correct timing? Could you do it the night before, at lights out or before bedtime? |
Not entirely sure but some fert/nutrients stay in the water column easy for plants to uptake only for a certain amount of time and to dose according to the photo-period would have the nutrients available to the plant when it needs it.