I suppose vetiver is native in that area that's why they are using it. But again, I dont expect any significant effect on P removal in the long run. If you really want to see an effect, then longer retention times are needed, which is not cost-effective.

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I suppose vetiver is native in that area that's why they are using it. But again, I dont expect any significant effect on P removal in the long run. If you really want to see an effect, then longer retention times are needed, which is not cost-effective.