I got an above ground pool for free on Craig's list. I set it up and used a 3" trash pump from harbor freight. Reduced the fittings to two inch I would get in the pond and dredge the muck to the pool then let the water settle and drain it back to the pond. I have some elevation so I can run a four inch pipe from the bottom of the pool to a pit area for the muck sludge to empty the pool