GTI wrote: 2000L/hr的泵都應該夠力卦.......
岩礁園丁 wrote: 咁細個缸唔駛咁多出水口, 兩個已經夠. 上水泵用 20R 會比 30RX 勁, 而且更慳電.
岩礁園丁 wrote: 因為 20R 的揚程比 30RX 好, 更適合上水.
白熊 wrote: 不如考慮買兩個"子宫"玩下, 唔駛用電, 兩個變四個
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