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☆ 放在濾槽的最上面
☆ 屬物理濾材 無任何污染 綠色環(huán)保濾料
☆ 同時(shí)能培養(yǎng)硝化菌 處理水中有害元素
☆ 尺寸可根據(jù)需要裁剪
★ dense material to filter the particles: feed and excrement , etc
★ being put in the filter tank
★ physical material without any pollution, being green filter
★ culture nitrobacterium to deal with the harmful element
★ various size to choose for customers’ need
