Ro/Di water is kept in a 12 gallon tank just above my sump water level is controlled with a float switch.
water flows through the kalk reactor through a float switch in my sump.
as evaporation occurs and water level drops in my sump water flows from reservoir to kalk reactor pushing out the kalk saturated water to the sump
the solution in reactor get stirred several times a day to keep the water saturated with Kalk