Weird Parameter Levels

[Mitch0928]

So In my reef tank everything was going great until I noticed weird alkalinity calcium and magnesium levels. My alkalinity went from a 9.0 to a 7.4, my calcium went from a 430 to a 500, and my magnesium went from a 1380 to a 1560. I also noticed that my frogspawn is not opening completely in my acans are annoyed. I have been checking my parameters every day and I’ve also tried to dose alkalinity to maybe fix the solution but nothing has worked. I did a water change to hopefully lower the magnesium and calcium but that has also not worked. The salt mix that I used is made for SPS specific course but I have never had an issue with it in the past. With a salinity at 35.0 PPT, it is supposed to make the calcium 430, magnesium 1280, and alkalinity eight. my salinity is 25.0 PPT and it has always been the same. If anyone can help me I would greatly appreciate it because I am worried for my frogspawn and acans

 

[Randy Holmes-Farley]

What time frame are we talking about for these changes?

The magnesium result is test error.

None of the values you report (except the salinity typo of 25 ppt) will bother corals.

 

[Mitch0928]

What time frame are we talking about for these changes?

The magnesium result is test error.

The changes happened within a week. I was on vacation while my mom handled the tank and she noticed the weird changes

 

[Mitch0928]

What time frame are we talking about for these changes?

The magnesium result is test error.

None of the values you report (except the salinity typo of 25 ppt) will bother corals.

what else could be wrong then?