水草情迷

缸就係長:11,高:7,闊:5.5(寸)
發覺用10蚊果d虹吸管,"鍊"到手跛都吸唔到水, 如果係大缸,鍊"兩下就好易吸到....係唔係水太少既關係??
小妹惟有用個樽蓋去"畢",但畢唔到cc<==main point
各位師兄師姐有無心得呢?唔該晒!

did you put the input to a higher position and output to a lower position?
it should be very easy and not related to the volume of the water.