Gary,

The success calk has raised my alk according to the titration I've been doing. I know what it does. The success Calk "helps" maintain both alk and a little calcium, but they do recommend using a calcium suplement along with it. I have seen anywhere from 1/2" to almost 3" of growth in my tank since I started using it like 2 months ago.

I also wrote a couple of posts later that I checked the manufacturer's site and the amount he put it his tank would only raise it thast much in the water volume of my tank, 22g.