Hehe. Its a small world airforceb2! I have a doser coming in the mail for the kalk. It is pretty basic, but it was dirt cheap compared to the others. Here is the thread on the doser I ordered:
Dosing Kalkwasser I am going to hook it up to a timer to run only 1 hour a day. I plan on having the doser and resevoir under the tank with a tube running up the back of the tank into the hob filter.
Right now I am dosing very primitively. I put a coatrack next to my tank, hang a gallon jug of kalkwasser mix on it and hang a hospital IV down into the tank and drip it LOL.
Grape caulerpa is ok to grow in the tank if you don't mind constantly pruning it. I didn't mind the pruning, but I did mind the cyano that had the tendency to grow on the root structures.
The only supplement I add to my tank is kalk and the very occasional alkalinity buffer.