Anyone have any good ideas how to clean out a pond? This has a couple of limitations - it cannot be refilled due to water restrictions, and there are at least 2 goldfish residents who have carved a tunnel and cave out of the sludge that is currently in the pond. I want to get the sludge out, let it refill with rain, and keep the fish alive (I don't have anywhere to put the fish while doing this. I also need to get some form of recycling bubbler/waterfall thingy in there to improve the water for the (big) fishies.
At the moment I am dreading having to remove sludge 1-2 handfuls at a time, sludge is nearly as bad as spiders.