The kalk paste plus a syringe is what I do, but it is so hard to control. Wish it wasnt even in my system. One thing I have done cool with it is glued it to the back of my tank and it has taken off there, just need to make sure no LR touches the back of the tank. It looks great on the back. Also won't grow lower on the back in the shade. Very easy to control on glass or acrylic also. Very pretty, very pesky.