Low Calcium

[reefy]

I'm building my first reef tank and have just added 45 lbs of live rock. I can't seem to get my calcium level above 300/350ppm. I'm using Calcium Reactor to try and increase the level, but it's not increasing. Should I increase the dosage? How much can I add without killing the rock?

 

[heavenly damsel]

I use the two part Calcium in the bottle by Kent and it works well. I have dripped calcium but it did not seem to raise the level any. I add the calcium once a week on saturdays when I do my tank testing and maintanance. Calcium stays near 450 all the time.