Cure for foul water?
The tapwater here is off-the-scale hard, so I collect rainwater from the
downspouts & keep it in 5-gal carboys for all my plants. Must have some
dissolved organic matter in it, because often it turns murky & gets real
stanky, like marsh gas. What would be the best way to treat this problem?
H2O2? Potassium permanganate? Or, ?
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