Never add calcium faster that your supplement recommends. IF you do, you could cause rapid precipitation of calcium in the tank...the least of your worries is cloudy water and white film on the rocks. The worst could cause your pumps to seize, or stop working if buildup is bad enough.
I would get at least a kalk drip up and running (ie kent aquadoser) for maintainence, and then you can add additional supplement daily to bring your levels where they need to be.