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Chlorinated tap water is a quiet problem for sativa plants grown in living soil or with beneficial microbes. The chlorine and especially chloramine that many municipalities use knock back the biology every time you water, which undermines the slow feeding these lines rely on. The water quality notes on https://hazesativaseeds.com cover letting water stand, using a carbon filter, and adding a small amount of humic acid to neutralise chloramine, which does not gas off on its own. Plants in synthetic hydro care much less, but the soil growers should pay attention.