Kalk Question

[untamed]

At some point, that stuff at the bottom of the Kalk reactor isn't Kalk anymore. IME, it gets to the point that it looks full of undissolved Kalk and has actually become ineffective.

Best way to tell is to do an alk or pH measurement from time to time on the output. Do it with a fresh mixed batch so you have a reference.

In my case, I find that a 1-2 cups lasts me almost 2 weeks. Beyond that point, I can tell that the Kalk is no longer effective at keeping my nightly pH up. That's how I know it needs changing...but you would not know it just to look at the reactor.