3/4 inch in 24 hours sounds a little high for evaporation but who knows. I gave up on trying to figure out what the 'real' evaporation rate should be day by day.
You could try a method that I recently started using to help nail down the water loss as evaporation or seepage. If your lucky like me and have another pond near by, you could do a comparison. My neighbor is nice enough to let me monitor his water loss at no charge
Our ponds a pretty close to the same size and his seems to hold water like a sink. Kinda like the grass is always greener on the other side of the fence. Just an idea....
