Magnesium and calcium levels

[Metrontech]

I purchase pharmaceutical grade from a guy here in the city

Its pure calcium carbonate

Also using Reef Crystals with the MAG and CAL added

Just did a 15 GALLON water change, I will do my reg testing later

Thanks again

Originally Posted by Aquattro

Not bad per se, but not needed. Ca on a reef is about 380ish. That's all you NEED. We keep it a bit higher in tanks to account for any sudden drops that might happen, giving us some wiggle room. Aiming for 400-420 is fine and leaves you that room.
What salt are you using, and how did you get to 450?