底缸用小沉馬維持住硝化系統水流, 主缸用個直流馬達造流, 應該會比較省電吧.
以Koralia 直流馬達為例, 只要2.3w有550gph.
Complete Range of Models:
From Koralia Nano 12V to Koralia 4 12V.
Propeller shaped rotor
For super perform ance from 260 to 1400gal
Very low power consumption
From 0.6 to 13.7 W.

Min 2.3W, Max 13.7W
Flow Rate: Min 550 GPH, Max 1400 GPH