is one of the most underused supplements in the hobby IMO
. It maintains BOTH Calcium and Alkalinity in a balanced manner, it precipitates phosphates, it helps maintain higher pH, etc. On top of that.....it's CHEAP!!!
During the winter, my evaporation rate increases substantially due to the central heating. My calcium demands also change frequently as I frag
often. That's why testing often is necessary.
Basically, I would recommend reading the directions on your Kalk
and then test and adjust accordingly. After a couple weeks, you will know your tanks particular needs.