I am a noob at this
. I have a pond about 250 gallons. On top of the rocks on the bottom there is lot of black/brown stuff it's thick and I am wondering what would be a good filter to use for this? All I have running is one of those av light filter things, keeps the water clear by using a light or something. But I really need like a sponge filter or something on the bottom to clean up this mess it is bad. And it doesn't help when every year my goldfish have more babies it may be getting overcrowded as well
anyways any help is appreciated.
anyways any help is appreciated.


and I really hate snakes. Ever since then I refuse to get in the pond, and that is when I got rid of that filter
.
not w/o damage to the fish.