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Grey laundry water for garden watering?
powders, switching between different brands, but I typically add: NapiSan OxyAction MAX Is this sort of grey water ok for lawn watering? I would encourage you to use your greywater on the lawn (or scrap the lawn - but that is another story). Many cleansing products are fairly harmless but there are some potential problems. Some even have a mild nutrient effect from phosphourus compounds. One problem is that some contain sodium salts in fair concentrations, if this were allowed to accumulate without being leached away it could sodize your soil. Too much sodium displaces necessary minerals (potassium, magnesium, calcium, etc) which is harmful to plants. This is particularly a problem with dishwasher powder that typically has much washing soda (sodium carbonate) in it. So you should avoid such products or only use greywater from them if it will be well diluted. The other problem is that antibacterial products like napisan will kill bacteria (duh!) in your soil, which is undesirable as in this natural environment they have a positive role. The modern super-clean attitude where every microbe should be dead is not right for the garden (nor for humans either but that is yet another story). Consider if napisan is important to your normal wash or could you and your lawn do without it. There are web pages devoted to this issue which contain lists of laundry products and ingredients or ratings for them. David |
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