Well, I thought I may just change the direction of the thread a bit, considering I have some experienced Kalk user's.. I have recently purchased a pump to dose kalk and wanted to eliminate the chore of dripping kalk and topping off RO/DI by doing it just once every month or two.. Two would be better considering the size of the mixing vessel.. But i have read that kalk loses concentration within a few days after being mixed. This was commented on by mike andrews, in calcium for dummies (((When using this method of kalkwasser addition, it is important to use the mixed kalkwasser within a few days. Old kalkwasser mix will lose its concentration of calcium in solution, which results in little calcium addition to the aquarium.)
What are peoples thought and experiences regarding this theory,,, I imagine it could be tested to see the validity of this statement..but I will let you experts comment on that.. thanks