can you use the aqua-lifters as a dosing , sure. is it the best option probably not, you might be better off to use a dosing pump for it. i do use a aqua-lifters for my kalk reactor from my RKL unit and works great. I run it for only like 20 sec every couple hours you can plug a doing pump into any of those controllers and they work great. IMO, I do think a dosing pump would be better in the long run if you talking about dosing some type of two part.