Calcium def or pH flux or both?

[Yeatster]

...sounds like nice tap water mate- far better than super hard water, that shit is a bummer across the board! Basically, it's the CaCO3 mineral content that's meant by water hardness-- how much dissolved rock is in there, measured in ppm's by a TDS meter,... EC is another measure, in fact, TDS/ppm is an extrapolation from EC, but TDS/ppm is not international standardized... EC is... I run my water at about 150ppm, blending more or less RO with tap to get me there.....

According to town website, 2015.

Alkalinity (ppm as CaCO3) 8-26
Buffering capacity in respects to PH.

Hardness (ppm as CaCO3) 20
Measure of the mineral content.

 

[Yeatster]

Waira, could you recommend a TDS meter?

 

[Waira]

... HM makes a nice one, not expensive, and seems solid for durability and accuracy,... shop around for pricing, but about $30-35 is typical,...