Doug- you can quote me on this. I have spent the better part of a month trying to find a quality and cost effective solution for maintaining the water level of my indoor Buddha fountain. The old method of shuttling a bucket to and from the bathtub got old real quick and I had neither the time nor the inclination to design and build an electronic device to autofill my fountain. Mechanical float valves were out of the question as it's kept indoors, sitting on my $10,000 newly installed wood floors. Just when I was about to give up and move it outdoors, Doug and Aquamediagroup saved Buddha from becoming a bird bath. THANK YOU! Harry Campbell