呢件嘢工效强過ATS [複製鏈接]

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論壇元老

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發表於 2016-3-17 17:11:41 |顯示全部樓層

* MarinePure's thick blocks are designed to be used in passive systems to control nitrates. If used in active systems they will eliminate ammonia and nitrites (nitrification).

我係佢官網睇到佢標注上面呢句，passive ststem即係咩野??有無師兄知道?

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