Is this considered a big alk swing?

[Dj City]

Alk

Alk min: 8.36 Alk average: 8.55 Alk max: 8.78

I don't know what people consider large or unacceptable swings.
I know that I have a hard time keeping the numbers closer than you see here.
Is this too much of a swing?

I have a hard time with calcium and mag too.

Calcium

Cal min: 408 Cal average: 427.73 Cal max: 467

Magnesium

Mag min: 1252 Mag avg: 1270 Mag max: 1280

Ph

Ph min: 7.79 Ph average: 7.92 Ph max: 8.12

Please advise

 

[DC Reefer]

Your ALK looks ok To me. It has moved A bit but not big swings in 24 hours. Your CA and MG look fine as well. These two are hard to get to move fast unless you are dosing a lot. I find my tridents are much more accurate for ALK and I see spikes up and down in CA and MG which I only pay attention to the trends. On one tank I use a CA reactor so I know CA and MG are not going to move fast. The other I dose 2 part with a DOS and MG manually every few weeks when needed so I know MG isn’t going to move fast either. My focus daily would be on ALK. I would focus on CA and MG every week or two.

Also when was the last time you calibrated? often when I calibrate I run a manual test on the 3 as a reference. Sometimes my ALK will be off by .1dkh and i just mentally note it when I monitor my trident.

 

[DC Reefer]

Here is the Trident graphs from one of my tanks. The MG spike is when I manually dosed. There is no way my CA is moving as much as it shows - it is around 500. The Alk does move a bit. The daily up and down is day to night and the general upward trend is from my PH starting to trend down (almost time to change out my CO2 media).

 

[Dj City]

Honestly,
I have not calibrated my probes or dos in close to a year.

Might not be a bad idea to calibrate.

 

[DC Reefer]

Honestly,
I have not calibrated my probes or dos in close to a year.

Might not be a bad idea to calibrate.

I was referring to the Trident, but would calibrate DOS and PH as well.