elevated calcium?

[nkxyy]

Hey all reefers, is there something wrong with the test kit, or am I tripping? I made sure the test kits aren't expired but my parameters are as followed
Salinity- 35.5 ppt
PH- 7.8
Alk- 10.4 Dkh (Hannah)
Phosphate- 0.26 ppm (Hannah)
Nitrate- 3.6 ppm (Hannah)
Mg- 1500 ppm (Columba)
Calcium 600 ppm (Seifert), (I used 1.2ml of the reagent; I'm not sure if I'm doing it wrong.)

Something is definitely wrong but not sure where I went wrong. Tank is almost a year old I do not dose and the water change was done weeks ago. I do run GFO, Nitra-guard titanium, and a fuge

 

[blaxsun]

You could always get another test kit to verify or have your LFS test your levels.

 

[Stigigemla]

If You use tap water it lokks like usual values to me.