Well, guess no one has come up with a stop-leak for ponds yet. Started losing water again 2 days ago and it has dropped below the patch put on so I guess there was a problem somewhere else. I have shut down the bog to rule that out and put my filter that was leaking a small amount into a container but no luck. Water level is now 6" in the shallow end. Most of the fish in this pond were going up for sale this spring anyway so I guess this would be a good time to move them to sale tanks.
Also, had my neighbor tell me he saw a redtailed hawk on the ground by the pond last week. I have seen it close by and yesterday I watched it swoop over the pond. The netting is now up but 2 pure white koi are missing! Not sure how many smaller fish he got as well. We have 3 pairs of hawks nesting in our neighborhood.