This is something to think about......
I went to good old Google.com and typed this in:
keeping+fish+safe+from+heron
What is below will be a rather good start. After reading some of this, you are not the only one with that problem. It seems as though the motioned sensors are the better way to go along with netting (which I would not want). They can be used with lights or water spray controlled by sensors as to the direction of attack.
http://www.aquatics-warehouse.co.uk/...ARERS_138.html
http://www.bindingstevens.com/Cant_B...smart_Them.htm
http://www.ponddoc.com/WhatsUpDoc/Pr...GreatBlue.html
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http://www.wetwebmedia.com/PondSubWe...acclimfaqs.htm
[quote]
koi
Hi Robert,
A blue heron has just eaten 6 of my 13 koi & comets. I have since put a
net over the pond, but the fish won't come out of their houses I had
made for them. I am sure they are still frightened but am quite
concerned about them. They have not eaten in a week. Will they get
over the scare and swim around as before? They use to come to me as
soon as they saw me for food.
Thank you for any help,
Irene
<Yes, your fish will recover, but this will take a few more weeks to a couple of months... Do be vigilant about keeping the netting in place... and consider placing motion activated lighting and sound effects about the pond's exterior... Good luck, life. Bob Fenner>
QUOTE]
Good luck Zone
Thanks
Dudelive