Unstable parameters ca , mg , kh

Volpone · Apr 15, 2014

Hi reefers , a question,what the reason for unstable parameters , I dont dose nothing only weekly water change, my tank mix reef , sps lps and softies ,
Last week I test and I get this reading
Ca:420
Mg:1380
Kh: 6.2
Today I test again and that what I get :
Ca: 440
Mg: 1460
Kh :9.3
Testing by salifert kit
My tank 100 g
And im using red sea coral pro salt .
Any explanation plz drop ur comments

mike007 · Apr 15, 2014

Your levels cannot go up from one day to another without doing water changes or dosing. I would think that your test results are inaccurate.

bearjohnson · Apr 15, 2014

I would make sure you are being accurate with your testing. Those test results don't seem correct as mentioned above.

Volpone · Apr 15, 2014

I do the test twice , and the old test was before 1 week ago , the other one was today , that why im so wondering even I dont dose anything ,

Reefing Madness · Apr 15, 2014

Was that test taken after your water change? Only thing that would make them go up without a water change would be the salt, dosing or bad test kits.

Volpone · Apr 15, 2014

I did the second test which I mention up before water change , and it was at moring time , the old test it was before a week after water change and at night time .
There is any reason to have that reading because day and night time ? For Ca , MG and kh ??
And again I dont dose nothing in my tank test kit is salifert and not expire to have wrong test reading

Reefing Madness · Apr 15, 2014

Ph would be the only thing bouncing around between day and night.

Volpone · Apr 15, 2014

It's so weird specially for hk , from 6.2 up to 9.7.
Any way I did my weekly water change and will test again tomorrow and will update the thread I did 15% .will update the post tomorrow

reefstc · Apr 15, 2014

try a different test kit and compare the results...

PatW · Apr 17, 2014

Volpone said:
It's so weird specially for hk , from 6.2 up to 9.7.
Any way I did my weekly water change and will test again tomorrow and will update the thread I did 15% .will update the post tomorrow

That is my thinking also. The other results could well be within the margin of error. But the kh readings are way off.