"Ka30P" wrote in message
...

By silting up do you mean that there is suspended dirt in the water?
The fish might be stirring up the dirt that has settled to the bottom.
Bottom
feeders are good at hovering up stuff and spitting it out again.
Not sure about your filters but sometimes you can add a layer of cotton or
poly
batting and it will catch a lot of dirt. Do watch it closely to make sure
it
doesn't clog up and send water over the side or out another way.

Having owned an orange pond of an entire season, I can tell you...

1. Patience is key
2. It doesn't hurt to get in, stir it all up and then do a partial drain and
refill. Several of these will help.
3. If you let it all settle out, getting in and scooping out by hand, is a
big help, but that will certainly lead to stirring up the silt. See #2.
4. Water Hyacinth do a very nice job of collecting fine silt. And you can
wring the roots out too.
5. Solve the source. If you are still dumping silt in when it rains, no
amount of filtering will help.
6. Cotton batting works to a point, but is not an end solution.
7. Did I mention patience?

BV.