Andrew
The corals you are looking to keep do not have high calcium or alkalinity demands which are the primary elements replaced via dosing. IMO your weekly water changes will be sufficient to maintain these elements at acceptable levels.
Also, dosing blindly is not a good idea. If you are not able to measure your calcium, alk, magnesium etc then don't dose these elements. But, if you can measure them, and your water changes are not maintaining adequate levels, then dose away :)