i heard that you justy have to wait 4hrs and it should be ok. i do that in my system now and so far so good!!
i would think you'd want it to be cloudy, because your adding the kalk to the system right? plus it settles more in the bottom of the dripping container.
this works great for me

but i'm not sure if there's a diffrence in the type of kalk your using.
good luck
