Saved my koi!
[[VIDEOID:2f648d991c6c3786a81ddee3774f22de]] I lost more than 15 koi fish to a mink before I set these up last winter.  I would have given 5 stars but I cut a star because of build quality.  I had to exchange two units as the solar cells were not charging the batteries.  Having said that, I am very grateful that this product helped me save the remaining fish.  The video says it all. This was the last time that the little monster visited our pond!
Rating: 4 stars