look at the waterfall, see if any water run to any place you dont want to. then look at the splash, does it splash a lot? you can also lost water that way. is it a hot day?
You might have several small water losses through the waterfall runoff (water runs the wrong way) the splash, and the heat/wind and combined all might be a lot.
if you dont think any of these are causing all the water loss, let the water drop to the lowerst point it could to see where the leaks in the liner is.
sorry this happened
mine lost about an inch a day but stopped at about 3 inches below level, so mine just water loss through waterfall/ water splashing/ water whisking.
You might have several small water losses through the waterfall runoff (water runs the wrong way) the splash, and the heat/wind and combined all might be a lot.
if you dont think any of these are causing all the water loss, let the water drop to the lowerst point it could to see where the leaks in the liner is.
sorry this happened
mine lost about an inch a day but stopped at about 3 inches below level, so mine just water loss through waterfall/ water splashing/ water whisking.