If Mike does not read this, I will call him tonight Sam. He can take a pic of it for you.
I dont believe the Osmomat would work in a sump. I would think the sumps water level would have to be to high, allowing no room for back-up. Not sure why I keep running the sump as my scrubber, skimmer, and co2 reactor run direct from the main tank. Also I have always kept heaters and such in the tank and not in a sump.
Suppose its so I can combat flatworms better.
Agreed about following the Tunze website.
Several have mentioned that to Rodger. I would also agree, any kalk rector would work. Just has to be small enough for the pump to drive it. I cant even drive mine with a Hagen 800 ph.