I have a pond that was built 20 yrs ago. Recently I found where the riser has almost rusted off of the pipe and is leaning over and about to fall off. That doesn't concern me as much as there is a V-shaped like hole in the top of the pipe. I have bought a galvanized pipe that is split that you fold up and shove down the pipe and it will open up to try to close off the water from rushing in. It appears to me this is a temporary fix and I will have to replace the pipe real soon. Does anyone have any ideas on how I can replace the pipe and not lose too many fish?
Thanks for any suggestions.