Hello everyone I have owned this Kamoer x2sr for a few weeks but I can’t calibrate it properly, I calibrate it but every time I test the pump’s accuracy it never doses the amount I want, I have the pump next to my reef tank, waste water goes down to my basement directly to the drain and my fresh salt water is also under the aquarium in my basement. I understand that I am fighting gravity so my questions is how do fix this problem? Would it help to move the pump down to basement? I have no way of having the container in the main floor or even the drain hose I need to send it down and up. I thank everyone in advance.