Instant ocean, new bucket over 600ppm?

[Aquattro]

I would question that reading. A lot! I'm not even sure Ca can hit 600 without precipitating Water is mixed to 1.026? I'd double check with a different test.

[Myka]

Did you roll the bucket to mix it before using it?

[Nano]

Yeah that's weird IME IO has low calcium atleast that's what I find usually about 320-360

[1eyedjyde]

Roll that bucket around and re test I use io salt and have to dose my change water with ca and mg. I would also test your tank water to make sure the checker is calibrated, I would assume your tank will be under 600.

[monocus]

it's an error-re read the directions.remember to fill up the syringe to the 1.0 mark with test water then only dispence1/10 of it

[Bblinks]

Did you retest by chance?

[Enigma]

My Hanna Calcium checker is fussy. I'm having a hard time with it. It routinely tests high. Not as high as what the values you're getting, but high. My ELOS and Seachem calcium tests agree with each other, while my checker is often 50ppm higher for some reason.

I would test again with the checker, and if the values are still high, have your LFS or another reefer check the values for you (or, purchase a reliable titration test).