For a jar test,
1. Go get a clear jar
2. Fill it with your water
3. Place it in a dark closet for several days
4. Check to see if the solids settled

its that easy.

If the solids settle, your pond will settle unless you add fish that stir up those solids.

If not, look into Alum treatment.

Brian

The one thing is the one thing
A dry fly catches no fish
Try not to be THAT 10%