I have tried all kinds of dosers including the Aqualifter pump, the best thing I have found is one of these recommissioned hospital IV peristaltic devices.
I found mine on Ebay but they are worth the money new. I use the device to feed my calcium reactor partnered with my reef controller controlling the PH inside the reactor. I do not have to fiddle with bubble rates, drip rates or anything.
If my ALK levels are off I just increase the ML per Hour or decrease depending on my test results. Easy as PIE!! Next to my controller this is the best purchase I made for my system in regards to water quality.
