However, over time the pond fill sup with dead leaves that slowly rot away and drop to the pond floor and yes you have guessed it, eventually they get sucked into the pipe and bung it all up so we have to drain the pond, clear it up and then unclog the pipe.
In the photo you can see Nuch trying not to fall in as she rakes the leaves from the bottom of the pond and also the end of the pipe (with the right angle turned up to stop it sucking up the mud.We came back a few hours later and the pond was completely filled again.