Magnesium levels rising

[WVReefJunkie]

220 Gallon Mixed Reef
PH-8.30
Temp-78.1
Alk-7.95
Calcium-430
Mag-1500

My magnesium usually stays in the 1300 range, but over the last couple of days it has risen to 1500. I dose Seachem Reef builder for All, and also have a KS-100 Reef Octopus Kalk Reactor. Why would Mag take a rise, and All & Calcium staying pretty consistent? I would like to get my Mag around 1250. I use Reef Crystal salt mix. Thanks for looking at my post.

 

[WVReefJunkie]

Alk rather, spell check on phone. Sorry

 

[Randy Holmes-Farley Verified Community Expert]

Testing error. There's no other possible explanation.

In 220 gallons of water, you'd need to add several pounds of a typical dry magnesium supplement to boost magnesium by 200 ppm.

But whether it is 1300 ppm or 1500 ppm, there's no need to do anything about it. Both are fine.