Depending on where you live and your indoor CO2 levels, you may have a difficult time maintaining a pH of 8.5 with clear Kalk. on a doser. Your evaporation rate will play into this strategy as well (e.g. the greater your evaporation rate, the more Kalk. you will be able to dose and the better your chances are of maintaining a pH of 8.4 - 8.5). Here is a link to a bunch of articles by Randy Holmes-Farley that might help as you work through the Kalk. dosing and what you are experiencing once you start dosing it.
Regards,
Jeff
Regards,
Jeff