I spent an hour in the pond today -- ALL the way in. It is up to my ribcage standing and I had to squat down to my chin -- to individually fish out the hundreds of slippery, slimy acorns that fell in this year. Hubby doesn't like the way the tulle looks over the net (an effective way to keep the acorns out) so I tried it without. "How many acorns can there be?" I thought. The answer is three big dishpans full. There were hundreds. All stuck between the rocks in the walls, hiding in the plants and down in the roots of the big iris. There were sooo many. I was cold when I got done!