High Quality By DICI Single Gauge CO2 Regulator+soleniod+2 bubble Counter
CO2 aquarium pressure reduced CO2 regulator with two 
        precision needle valve assures constant CO2 dosing rate. 
The solenoid valve will allow the CO2 to only enter the 
       aquarium during the day to prevent pH swings at night 
       that can be detrimental to your fish.
The bubble counter has the non-return function. 
New design washer, no wrench needed.
Two outputs, easily manipulated.
KINDLY NOTE THAT COLOR MAY VARRY FROM PHOTO !!!