七仔 wrote: loming哥, 估計skimmer係後加; 棉箱只可過濾粗粒污物, 其餘污物會被頭二倉的環幾近完全阻隔後才流入skimmer倉, 環變成過濾污物及疍白質的濾材, 結果可從缸內紅苔睇到; 暖管亦不好與鈦喉同放一倉。過濾棉應離水用, 放頭倉不好。現在的沙缸同skimmer好難配合使用, 就算打通頭二倉夠位放skimmer又唔知點放環, 最好做個新沙缸就翻主角skimmer
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