I dose every other day, or I find I get brown algae growing on the glass. This was the suggested dosing on the Zeovit forum (they will tell you what to dose). So about half what the bottle says.
FWIW, I decided to really follow the dosing protocol properly, and for two months I haven't missed a day. I have noticed no change from when I dosed every other month
I think the zeo rocks are good, but the drops, meh...