Thank you Zsolt ! It's a good idea ! No, I didn't try with Lime. I Always have some problems with Lime, because it's necessary to correct the pH after that and not to mention the huge amount of sludge that it's generated.

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Thank you Zsolt ! It's a good idea !

No, I didn't try with Lime. I Always have some problems with Lime, because it's necessary to correct the pH after that and not to mention the huge amount of sludge that it's generated.