I have the specs from my local water and was wondering if anyone could answer a question for me.

Is my harness kh,gh enough or should i add gh boooster at water change and if so how much? Running a 60gal, highlight, co2.

mg/L(aka. ppm)
Harness Caco3 - 200-240
Bicarbonate Hco3 - 100-120
Calcium Ca - 48-56
Magnesium Mg - 20-24
Sulfate So4- - 150-190

Thanks!

It looks like you have plenty of magnesium and probably enough calcium, so you don't need GH booster, in my opinion. The HCO3 concentration looks like the KH is good enough too.