raising calcium

[kware]

My calcium is at 340 and the dkh is at 12 with a ph of 8.4. I added magnesium and am using kent liquid calcium. The calcium levels won't go above 340. I am worried about overdosing but every time I test it reads 340. What does anybody think? Is my ph too high? I don't have any coral just liverock 5 fish a sebae anemone and a pencil urchan. Any suggestions would help greatly.
This website is a great help.

[bertoni]

You probably just need to add more, but what's the magnesium level?

This calculator will help with a dose:

http://home.comcast.net/~jdieck1/chem_calc3.html

[Brandon Cassidy]

Hmmm. Mne is fine with Kent. What else are you adding to the water?