I Had Koi for years here...up until last year... I got cleaned out by a great egret. I don't fault the bird...It was doing what it was designed to do.. It my fault ..I never had the problem and never took the steps to prevent it.
Thinking I may convert the pond to Lily plants,Bladder worts , frogs and mosquito fish
The irony is I'll drive hundred to thousands of miles to photo Heron and Egrets and I couldn't get one pic of this fellow at all!
-al