I have about a 500 gal pond with 5 red snakeheads in it. Its just square with a rubber pond liner, no subtrate. It has a custom wet dry filter with another pond pump(about 1400gph) to help circulate the water better. After a few good feedings of fish filets or smelt or anything messy the water is full of small bits of food still and it just never seems to find the filter. Is there a better way to clean out the pond. Id rather not have to wade into it every few days and clean it manually, Id really like a filtration system that is fairly self sufficient and just needs regular filter maintenence. Or even a cheap vaccum or something to help out. Thnx.