I need some help with my stupid hard water I have here in Indiana. I know my water is hard because my Ph is on the high end of 7ish and I get mineral build on my glass top. I will be putting a pressurized co2 system on the tank soon for live plants, but I do not believe this will lower my ph for good unless I make my water softer first, right? Should I get a RO unit or is there something else I can do? Thanks.