Alk Ca and Mg big jump

[Cwentz758]

Hello all just questioning a rather big jump in my chemistry from Jan 7, 2020 until today Jan 15.

ive attached a pic of the results. The only changes between the two tests were a 10g water change vs my normal 5g change I also used metroplex and prime during feeding to cure a bug in one of my clowns.

 

[Randy Holmes-Farley Verified Community Expert]

If that water change was not close to 100%, the magnesium jump is almost certainly an error. The calcium change is small and may be error too. In any case, I’d ignore the calcium change, Both values are perfectly fine.