Kalkwasser stirrer

[corrosionjerry]

I purchased an aquamedics stirrer / all seams well except for the fact that once the ro top off goes through the saturated water in the aquamedics stirrer and is finnished topping off my sump, the ato stops the water then the saturated water in the stirrer back syponsons about 1/4 of the kalkwasser solution from the stirrer container into my ro water container..... any ideas what I need to do to stop this from happening as I see some the kalkwasser settling on the botom of my ro water container.

Thanks for any advice