Well, I did overestimate the max depth. Turned out to be 9'10" when the pond is full. The good news is that I think I underestimated the average depth. I believe it is closer to 6' instead of 5'. Anyway, I wasn't all that far off. The pond has fluctuated about 1.5' over the summer and we have well water, so I was wondering if there is any way to add water via my well without spending a load of money. Any thoughts?