Can you be more descriptive about the white stuff on the surface of the water?
It could be snow flakes, cotton buds, cream puffs, semen, shaving cream, or even paint.... Did it disappear? After how long? Did it stay? Is it hard? Is it affecting your livestock? What are your concerns exactly?
Also, what did you exactly do in preparing your kalkwasser for dripping?
Sorry.. but I just want to highlight that if you want quick immediate answers, please provide a lot more details in your questions.
Thanks,
AT