thanks for the reply Randy
its kinda funny, imdosing kalk in a makeshift way. i have a powerhead hooked to i timer that comes on for one minute each hour. each minute its set to dose around .08 ( i measured in a gal container) then i have a flote valve that shuts off wen the water level is at a certain point.
i probly get about a half gall evaperation a day.
sorry for the long response but its kinda weird how i dose kalk