@Biotope BiologistFound a Bypass valve for the water softener and tested.
pH- No change, 8+
GH- 25-50ppm (1.39 dGH - 2.79 dGH)
KH- No change, 0 ish @Rube_Goldfish
So if aerating my tap causes a decrease in pH, in theory I just add crushed coral to raise the KH, Equilibrium for the GH and thats it?
Im going to keep some of the hardier fish like Live Bearers, cherry barbs etc until I can dial in my water.