It keeps the bears from using it as a hot tub. They would get completely in the tank and displace some much water it would be 14-16 inches low, that made it tough for the deer to get a drink. They are hard to see but I have earth anchors on each end to keep the bars in place, doesn't bother the deer in the least.
Apparently I have a touched vegan coyote, and the turkeys couldn't care less that he's there. This is also why I need high residue to slow these buzzards down. 400 pounds per acre of turkeys grazing my plots would put a hurt on that in 48 hours.