Calcium levels too high

[nexusnight]

So heres the deal,  ??? i did a 20% water change on my 55g yesterday afternoon and today tested my params. the only ones I am testing are amm, nitrate, nitrite,ph,calc,alk. i dont have a mag or phos tester yet.
Day prior to WC results are... 0 for amm,nitrite and nitrate all on api kits
                                                      Alk 150ppm/ 8.4 dkh  Hanna checker
                                                      Calcium 521 ppm. Hanna, tested twice and both read within 4 ppm
                                                      Ph 8.2 api

Today after Wc                        still 0 for amm,nitrate,nitrite
                                                    Alk 157ppm/ 8.80 dkh
                                                    Calcium 540 ppm
                                                      Ph 8.2
specific gravity maintained at 1.025 constant
I tested the WC water and its good for calcium on the hanna test kit. 437ppm
Not sure why its so high as i do not dose anything and the salts been the same and same ro water source.
Can I reduce this calcium level? Should I even be concerned about it? Does Mag play a crucial role to this level as I dont have a test kit for it yet. May get one today.
Thanks!!!!

 

[Neopimp]

Wouldn't be voncerned.  It will come down slowly.

 

[Petercar (RIP Dec 2017)]

Throw the CAL  hanna in the garbage

 

[nexusnight]

Why should i throw it out? Not accurate?. Seem to be consistant and work well.

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[Duke]

Throw the CAL  hanna in the garbage

Agree, there's just simply no way those results are accurate unless your dosing something with calcium in it..

If your water change water was only 437..Then u would have seen a slight decrease from the water change.. U need another calcium test to compare it too. I suggest the red Sea pro kit.

 

[Petercar (RIP Dec 2017)]

There is a whole topic about it in reef cemtral.  They said yu need a proper syringe and a funnel and 0 tds water

 

[nexusnight]

Ok ill het another kit to compare with i gueas. Seems odd though. I did all my tests with the same hanna. WC and tank water.

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[nexusnight]

Just a thought, is it possible my sand and rock could be the cause of increased calc readings?

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[Duke]

If it's new sand that's definitely a possibility. Doc you syphon it? I if u do I'd just leave It alone for a whle

 

[nexusnight]

I did do the sand when i did my water change. ill leave it for a while and see. its still a fairly new tank like 6 weeks. the coraline is just starting to show on the rockwork. i just wanted to know if it was a problem or more whats the cause so i can get and keep my tank stable. Figured now is better than when its fully stocked

 

[tdb320reef]

Throw the CAL  hanna in the garbage

+1  CA,  ALK and MG are like a bowl of marbles with the same amount of marbles all of the time.  If the CA was that high y'd have eyepoppyng low alk or MG.  Get a different test kit.