We have a smallish garden pond with several large koi, four smaller ones and a handful of goldfish. Yesterday my neighbour decided to cut down a very large tree, filling my pond with sawdust. I was at work so only got home to discover a white pond. I have scooped out as much as I could (it was an inch thick across the surface) but obviously there is a lot left in the pond that I couldn't remove. There is also a film of wood oil over the pond now too. I have had the pump on all night but the fish are already looking very distressed and I just don't know what to do! To remove them all would mean putting them into untreated water that could kill them anyway and to get the pond clean will mean emptying it completely so they would have to go back into untreated water. I have threatened to sue for the damage but right now just want to save the fish and wonderful pond that we had created. Please help!!!