RE: adding Kalk
You've just seen a good example of what I was referring to earlier. By adding Kalk, you've added both Alk and Ca...yet only seen a lift in the Alk.
As Kalk has a very high pH, that explains why the tank pH moved up....but that effect would only be temporary. I don't know how you are measuring your tank pH, but if you measured it every hour you would find that it moves considerably through the day/night cycle. That is normal.
In fact, the main concern with pH is mostly about not moving it around too fast. What it actually IS at any given point in time isn't too important. (to a point..of course)
__________________
400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436
|