Tunze Osmolator topoff system FS

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I run mine without a kalk dispenser in the bottom of a container of kalkwasser, it is sitting on eggcrate to keep it above the kalk residue at the bottom of the container, it works fine. The only issue is the pump will seize up from Calcium carbonate deposits sooner this way, easily avoided by periodically running the pump in a bucket of vinegar.