BRS 2 part vs Kalkwasser

[DracoKat]

whas the difference between these two calcium product? Is one better than the other?

 

[Randy Holmes-Farley Verified Community Expert]

Both work fine. I compare the pros and cons of these and other methods here:

The Many Methods for Supplementing Calcium and Alkalinity - REEFEDITION
https://www.reef2reef.com/blog/the-many-methods-for-supplementing-calcium-and-alkalinity