Alk falling while Ca Rises using KALK.

[MPS]

What might cause one element to fall while the other climbs? I currently dose 85ml of Kalk per day at a concentration of 2tsp/gal.
I've been fighting to find the correct amount of kalk to dose into my system. I have a 120Gal tank with a mix of LPS, Montipora, Stylophora and one Maxima clam. I've been dosing Kalk via a Neptune DOS. Ca and Alk levels were both stable at around the 450ppm and 10dkh. Then things started to shift. Consumption went up and I have been struggling to find equilibrium for months.
The major problem is that Alk is falling (currently 8.1) and Ca is climbing (556 now). Mg is at 1335.
What might cause one element to fall while the other climbs? I currently dose 85ml of Kalk per day at a concentration of 2tsp/gal. Perhaps its time to switch to 2-part. ?

 

[Coralreefer1]

Basically, alkalinity and calcium work in opposite directs. If one is high then the other will be low and vice versa. The reason for this can be illustrated by thinking of alkalinity as a blue marble and calcium as white.
Trying to find the happy medium is difficult to do especially with the amount of livestock in every aquarist is different.
Ok, so say you have a flask of white(calcium) marbles that are almost to the top of the flask. When you go to add the blue(alkalinity) to the flask, you can only add so many before they spill out of the flask. This is where you are at. Once your water is supersaturated with calcium and alkalinity, your water will not hold anymore so it precipitates out.
The best thing to do would be to do a large water change. Then you can alter your alkalinity to bring it up and drop your calcium.

 

[MPS]

Basically, alkalinity and calcium work in opposite directs. If one is high then the other will be low and vice versa. The reason for this can be illustrated by thinking of alkalinity as a blue marble and calcium as white.
Trying to find the happy medium is difficult to do especially with the amount of livestock in every aquarist is different.
Ok, so say you have a flask of white(calcium) marbles that are almost to the top of the flask. When you go to add the blue(alkalinity) to the flask, you can only add so many before they spill out of the flask. This is where you are at. Once your water is supersaturated with calcium and alkalinity, your water will not hold anymore so it precipitates out.
The best thing to do would be to do a large water change. Then you can alter your alkalinity to bring it up and drop your calcium.

Ok, sounds fair to me. I thought that they were fairly independent of one another. I'll start prepping some new SW.