A Blue Heron got a peck at my Koi a few weeks ago but I luckily came outside to find it out of the pond, I quickly ran over, picked it up and placed it back in the water. He is still alive and was doing fine until the same thing happened this morning! Unfortunately, he got pecked a bit harder a couple times on the head above the eye toward the gill. I again, ran over picked him up and put him back in the water, only this time, he has not recovered as well. After reading some forums on www.koi phen.com/forums I put him in a container, put some neosporin on the wound and put 5 drops on stress coat in there. He is such a Rambo! He is still "dazed" but looks at me when I walk up and is still breathing and moving his fins but he is ?lopsided? I am not sure that he will pull through... The other Koi didn't come up from the bottom of the pond until later this afternoon... poor things :(

I've battled probably the same heron for about 3 years. He comes in during winter through early spring. Always in the AM. I tried the fishing line, watched him circle and circle, army crawl through it and finally he flew up and crashed down in the middle of the pond in the deep water, like a duck. a big duck. They are persistent nasty things. I named mine Smaug, after the Hobbit dragon. This winter I went with a green house plastic over the main pond area, to keep him out and to keep the sub tropical fish alive. it worked. The day after I removed the plastic this spring, he showed up. The effective deterrents for me have been: 1. Me. Any movement in the house, the drapes open, I get up off the sofa, he sees me through the window and he's gone. Every time. The pond is about 50 feet back from the house. If i want to watch him, i HAVE to sit perfectly still inside the house; they have amazing eyesight. 2. Truck netting. I buy truck bungee netting on Amazon and stretch them out over the main pond. It works pretty well and is a compromise from full fish netting, this way I can let the birds and the frogs in and out, the big birds have a harder time. This year I got the alligator head. It looks really good, moving with the current, like the real thing. Not sure it'll work for long but anything helps. I also put out a cheap radio on batteries, talk radio. I am also this year going to capitalize on movement. Since he always leaves when he sees anyone moving in the house, I bought a wemo device. I can power on or off, either from my smart phone or on a schedule, any electronic device. I hooked up a circulating fan to it, aiming it at my drapes. From the outside, it appears to be someone moving the drapes. Someone suggested going with one of those tube dancing things, the kind you see for advertising. I think it would work for a while. What I really want is a halloween witch i see on Amazon, its a motion or powered activated full standing prop. Its crouched down, and when activated stands to full height, makes noise, etc. that is something I could use on the back porch or in various places in the house where it would be seen. I also have a Foscam camera, with audio. I've yet to catch the heron on the motion sensor, but having the ability to tie in anytime, anywhere is very powerful. I would not go without having an IP based camera to monitor, even if its just a passive device, knowledge is everything.

I use a net. I just feel safer after numerous heron attacks. It's not that bad - virtually invisible until you get close. I don't like the idea of fishing line because we have a dog who would run right into it and I don't want to hurt him. Also, we like to get into the pond periodically to fertilize and maintain the plants. All we have to do it take off the net. I don't want to mess with fishing line. We've come up with a pretty good system I think. We drive 4 foot stakes in the pond (3 feet when done) and secure the net to the tops and sides of the stakes keeping it about 6 inches from the bottom so the frogs and birds still have access. But I think the line would probably work if that's the way you want to go. I fence our pond over winter so no one accidentally steps into it - we can get many feet of snow in a season and the fence gives me a guideline since it's right off our patio. Also keeps the dog off it. By the time I can get the net on in the spring, no herons have figured out how to cross the fence - however that hasn't stopped them from visiting. I'm sure they're taking notes! Our fencing is 2-1/2 feet tall. Be sure you string the line as close to the edges of your pond as you can. If the heron can fly into your pond and land on something, the line will be useless.

I guess before I'd jump into treating the whole pond with anything I'd first try using non-iodized salt (Kosher salt, pickling salt...any variety that isn't iodized). I've dosed my pond up to about 0.1% (approximately 1 pound per 100 gallons) and found over the years that it will help a majority of problems. If you choose the salt route mix the salt in pond water and add it throughout a day. After about a week or so you can then reduce the salt content through water changes (or if you live in the Northeast this year just let it rain!!! LOL!). I've seen no effect on the traditional plants (hardy lilies, water hyacinths, lotus, etc.) that most folks use in their ponds. This is a fairly cheap treatment that will have minimal impact on your biofilter. Good luck getting your pond straightened out. ---David