Balling method?

[Acronuts]

I am currently looking at different methods of dosing.In my research so far I have kept coming across this"Balling Method."
I am interested in finding out more about it before I spend any money on reactors or dosing pumps.
Is there a website that I may be able to read more about it?
Thank you

 

[Yellowtang]

Heinz's Balling method: http://riffaquarium.hm-photogalerie.de/lang_eng/info_3_eng.html

JR,