I repurposed my spare ring solar panel (added a USB extender for the camera and a DC to USB converter for the pump) and now it's a working baby fountain. Hose is 3/8" ID and 1/2" OD (now uses cable ties instead of pipe clamps to attach to pump). Pumps 18" vertically with no problems. So far it turns on with the sun every day. I would recommend a little over 2.2w for this as I've repurposed it and it currently only runs in direct sunlight and stops at cloud cover, in the photo it is actually battery powered.
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