Jim i dont have any more room under the tank for the kalk reactor so i willl have to put it in the back room... if the water level never drops (because i have the float valve from the D/I unit) how will the kalk reactor know whebn to dose ??? i saw the float switch in the e-m you sent me but i still dont understand that if the switch bulb never drops the kalk wont get to the tank... does that make sence???