The Hydros simple doser is a Kamoer built pump. It will run when powered at around a 43ml flow rate. You can calibrate the Hydros to the pump by doing the calibration if you use it with a dosing schedule. You can also use it with a generic output and there you could use a timer and pH reading to control it. I use one for my ATO and it is in my garage and the tank is 35ft away. The tubing between the pump and tank is run up through the attic inside insulated PVC conduit. I have been using it for about 2 1/2 years now.