Review on Efficient and Versatile: Jebao DP-3 Programmable Auto Dosing Pump with 3 Channels in Sleek Black by Heather Oliver

Instructions are missing so let me help you a little. The equation 100mL = 200 does not mean it is calibrated for 200x dosing to 100mL. You need to calibrate it yourself to stop at 100ml. So you'll probably use around 100ml of your chemical for this, but once that's done you're good to go. YouTube how to get through the menu when the instructions are confusing. I used a measuring glass to calibrate, I started calibrating until the liquid filled the tube and then stopped, this should have filled the lines. Then I poured a few ml into the beaker and started again, this time until the beaker had 100ml, then hit the up arrow to stop the calibration. This was around 230 and 235 for the 2 I use. I got it running while I knew I would be home so I could keep an eye on it for about a week and make sure it was running smoothly. I will update in a few weeks.