Sorry Joe you have that exactly backwards. The further forward any ballast added will reduce the required amount of ballast. The bows of the floats on any proper twin float installation is even further forward of the propeller. Adding ballast back in the airplane will only increase the amount needed.
Also if one still wants to add ballast to the airplane only it will increase the amount of ballast needed as well as loosing the ability to quickly change back and forth from floats to wheels easily without rebalancing every time. If that is what one wants but I don,t believe it was the case with this OP.
John