That the way I’ll do it I think. Do you continually top up the kalk with RO?
I have a BRS 50 ml/min dosing pump. It is plugged into an AC outlet on a Hydros outlet strip. Hydros has a pH probe.
The doser pumps RODI into the stirrer every 15 minutes based on a dosing schedule in Hydros. How long the doser runs determines how much Kalk comes out and tries to keep the pH in a range I set in the controller.
Hydros also runs the stirring which is done by a Jebao wavemaker inside the vat.
Hydros also has control of my RODI filter and keeps the RODI storage container full.
The vat is a sump pump basin that has a separate lid and seals from Home Depot. Uniseals come with the lid for power and plumbing. 2 big holes and a small one. I drilled a hole in the top and installed a tube for the RODI water in.
I drilled a hole in the side near the top and installed a tube. I bent a piece of tubing with heat and made a drip tube. The height of the end of the tube matches the level of liquid in the vat. When the doser pushes water into the vat it overflows Kalk out the drip tube.
I add about 2 cups of pickling lime into the vat once a month.
The biggest pain was getting the drip tube to not clog.
My system is big enough that if some slurry comes out the tube it doesn't matter.
The controller tries to maintain a pH range. If the kalk in the vat is not fully saturated or has powder in suspension (kalk slurry) the controller just puts more or less in.
You could also mix kalk in a trashcan and just dose it. You then make more every so often. I dont even remember why I chose one method over the other. I suppose I decided it would be easier for me to just add some powder every so often than try and mix a large batch when it was empty. The way I did it takes less of my immediate attention.
The last trick to all of this.
In Hydros
you tell the controller the dosing pump is 5 (!!!five, only five!!) ml a minute. This makes what comes out 10x as much as what the programming says because the pump is 50ml/min.
In the log is says the dose was 7.2ml. it actually was 72ml.
This defeats the limitation in the programming for the maximum volume that can be dosed on a schedule in Hydros. It goes from 500 to 5000ml.