Flexible and precise control of liquid additions to your aquarium. Easy to use mobile interface make set up a breeze. Dosing Times: 12 times/day -once/31 days Fluid Volume: 1ml - 6000ml Add multiple X1 pumps to control Flow calibration setting Operational modes (Manual, Auto Quick Setting) Easy setting - Set dosing start and stop time (does not have to be 24 hours) Enter total number of ml to be dosed over the time period Enter the number of times to dose each time period (up to 12 times) User can even choose dosing every 1 - 31 days or certain days per week Adjustable dosing volume Auto Mode: 0.5 - 6500.0ml Adjustable dosing volume Manual Mode: 0.1 - 6000.0ml Delay setting between channels prevents chemical interference *Requires Bluetooth capable mobile device to operate.