Your new C02 system will probably drive your PH down anyway.

Rico wrote:

I live in Florida and the water seems to be on the hard side. Here are
the results of my tap water.
Ph 7.4-7.6
dKH 9
dGH 15
Nitrates 0
Would you still recommend using the tap or stick with the R/o and add
baking soda to it to raise it's KH?

My CO2 system should be here by the middle of next week. These are the
components: