Hi KMR,..
I am using a Dosing pump that i bought off of ---- to dose Coral Vital.
It is a used hospital pump and has setting to dose so many ml a hour etc,..
If this is what you are talking about and was wondering on the plumbing then what i do is to put the inlet from the pump down in the bottom of the gallon of Coral Vital. It then draws up the amount set to dose and that's about it.
Phil