I have been thinking to get the DOS system for while, the only problem that I have that the DOS reservoir is too small for my tank consumption (180 gallons sps tank) and 2 liters will not be enough for more than 2 weeks. so if I got 2 vertex 5 liter container and added 2 optical sensor then connected these optical sensors to DOS, will i got the same result and controllable as The DOS & DDR Dosing System Package?