My well is producing very very fine caustic or silicates, I don't know what. And if, for example, the dog bowl or bucket I was using dried out, a very, very fine white powder would stick to the bowl. I installed this filter and haven't found a fine suspension on the shells as they dry out for the past month. I think they work very well and I plan on buying more to keep them in stock. The only reason I didn't give 5 stars is that I wish I could give him more time to check the results.
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