finally got around to testing my water straight from the tap here...
ph: 7.2 - 7.6 (I have gotten a damn near same result from my tank but this tube seemed a decent bit more blue than the 7.2 which is more teal like lol but whatever)
gh: 179 (10 drops vs 9 drops from the tank)
kh: 3 (same 3 drops from tap and tank)
probably going to stack in bioballs in the filter to fill in space and filtering considering the carbon is gone for good (and will do the same with my smaller spec2)