Pond Boss Forums INTRO Questions & Observations How can I filter silt/sand from storm drain?

Can you back up the exit of the drains any distance from your pond? If so, you could then construct some small settling ponds that would first catch the discharge out of the pipes, allow it to settle somewhat, and then enter your pond. Catmandoo has written how he did this very thing here on the forum. Do a search for constructed wetlands and see what you can find.

Here are a couple to get you started:

Wetlands Thread 1

Wetlands Thread 2

Good luck and keep us posted.