I do DIY style kalkwasser. I use a 1 gallon container , puncture a
pin size hole at the bottom side of the container, put 3 grams of
kalkwasser in bott, fill three quarters with water, shake vigorously,
then let it drip into tank. U can use a toothpick to stick into the pin size
to slow down flow.
U would find the water abit slimy. I did it 3 times a week for 2 mths
n I had a tank full of purple rocks ) hope that's helpful to u
Cheers