Apparently most water companies these days use chloramine rather than chlorine as it is more stable and does not evaporate, so letting water sit or spraying it would not be any help given that information. I've used an 'aquasafe' product and always wondered that's in it. OK, searching says Sodium Hydroxymethane Sulfinate, Chelating Compounds, Polyvinylpyrollidones, Seaweed Biopolymers, Organic Hydrocolloids. Given that the product is fairly expensive, I wonder if a drop of seaweed/sequestered iron has the same effect, and whether a pond teeming with life and sediment will neutralise the chloramine all by itself anyway.
Thanks for your reply. I've ordered the product mentioned by borgadr above. I did look up our water quality, it did list chlorine but didn't mention chloramine at all.The rest was a bit too technical for me! We have very hard water and probably alkaline as we're on the South Dorset coast.
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