I have a Kalk stirrer to feed the sump. I will feed the stirrer with fresh ATO water. I have a magtool ato system and an apex liquid level sensor. If I use the magtool to feed the stirrer and the apex sensor towards the bottom of the ATO, kalk will be dosed at evaporation rate, correct? Will this be an efficient dose? Should I be worried about overdosing? The apex sensor will simply tell me when its time to refill the ATO. Thoughts on this set up? or should I get another nanopump in the ATO so one is dedicated to dosing while the other is dedicated to water level? Any words of wisdom are much appreciated!