You are looking for the good quatity dosing pump
silent operation
Suitable for aquarium, chemicals, liquids, dosing additives
it is very easy take apart and clean, just pull out and push in is ok

Specification:

Volts：                         DC 12V
current:                         80mA
working condition：       0-40℃
flow rate: ：                  0-100 ml/min
rotate speed：               0.1-100 rpm
driver size（Φx H）：   Dia.27.6 x Height 37.9 (mm)
powerhead size(Φx H):   Dia. 31.7 x Height 20.1(mm)
silica gel tube(IDxOD):   outer diameter 4.7mm,inside diameter 2.5mm
flow direction: you can control the flow direction by the positive and negative connect