Waterbug, koiguy, haro all know way more about pond stuff then I do, for sure. But I like Microbe-Lift, they are all bacteria products Their one product Microbe-lift PL I have used and it is an all around balancing type product but has a component to break down sludge and debris. I know I added some of that after we had all those winds and a lot of stuff was blown into the pond. The rocks all looked clean again the next day after I added it. They have a product specifically for sludge, Sludge-Away, seems like that stuff would work really awesome if the stuff not even designed for that works well. Says it is great for rock bottom ponds to make it easier to keep the bottom clean.
I wouldn't think you should have much sludge build up though since your pond was just cleaned.
I wouldn't think you should have much sludge build up though since your pond was just cleaned.