Kalkwasser use

[SDW]

I want to get a kalkwasser for my tank, primarily because I know that I need calcium supplementation for coral growth, and I cannot afford a calcium reactor. I have a RO unit for my water, but it is hooked up in my kitchen and not close to the tank. Is there a way to have a kalkwasser without having it hooked up to an ATO or a RO unit? Other ideas for keeping calcium levels up?
Thanks in advance for all help.

 

[Myteemouse]

You can stir it for a day with a pump of magnetic stirrer then DRIP it into the tank from above (or to the sump) with a air line and a little valve.. I did that for a few months before I got a reactor..