CA High WHY ?

[Antman]

Hello all question - why would my CA be always high Over 450 if I do not add any CA produtcs ?

[usmc121581]

When you say over 450 what excactly is it?

[DrBegalke]

Do you use oceanic salt?

[seapug]

could be that your salt mix is high in calcium and you don't have many rapidly calcifying organisms in your tank, like SPS corals, clams, etc. Also check your alkalinity. Might be low.

Either way, 450 is good. Consider yourself lucky.

[Antman]

2 months ago it was 477 this weeks test was 459
I was using IO and just changed to TMP

[Antman]

My alk is on the low side 2.3

[ronald7410]

<a href=showthread.php?s=&postid=11237654#post11237654 target=_blank>Originally posted</a> by Antman
My alk is on the low side 2.3
Add more alk. The two work inversely. Once you added more, keep up with your water changes.

[dendro982]

My IO had 360 ppm Ca...
May be try another test kit, different brand or from different batch?
I had once API Ca test kit, that shows 500ppm+ for the salt mix, where Seachem test shows 360. Was advised to get the same test kit, but from different source - from different batch. Now - normal results.