Dosing Pump Questions

[phi delt reefer]

+1 to Myka - get the drew's doser or the BRS two part ones (may go back on sale on boxing day to 69.99 each as per black friday so hold off if you can. I dont believe doser's can back siphon just given their design (liquid is pinched out in one direction) It's not a free flowing tube so its not like the return line in your tank. I am going to use some snazzy VOGA wine bottles i have laying around as dosing containers;