What you probably want, ideally, is a Litermeter remote pump module (RPM), which, by the way, is a less expensive option—-though both are hard to find currently—-and not one of their main units as an RPM serves the purpose when hacked and wired to an Osmolator. A Litermeter main unit is tied to its internal settings that you program after calibrating the pump and pumps a certain pre-set volume spread out 150 times per day whether needed or not while an RPM will pump on demand as instructed by your Osmolator until its sensors realizes you need no additional tip-off water supplied and shuts off the RPM. Another option is to get a Tunze switched socked (I just snagged a used one off eBay for around $35 shipped) and plug in any one of a multitude of choices of pumps although to push water uphill and also because of its long term reliability, a Litermeter is the gold standard. Sorry for the long note (and run on sentences) but I think my comments are accurate and hope they help.