BenignVanilla wrote:

I tellin' ya! This stuff just does not want to fall out. I don't want to add
any more calcite, for fear of over dosing the pond. Water changes, yeah,
water changes.

One thing that I've used to filter out pea green soup algae is a
drainage pipe filter sleeve. Maybe it would work for clay fines. See one
brand he

http://www.carriff.com/products_ds.html#features

The brand I bought is Plastic Services & Products and is available at
our local Home Depot. I used a 10 foot x 4 inch sleeve, doubled it (ran
half back through other half), tied a knot in one end, and used a
plastic strip tie or a wire-tie to attach it to pump outlet pipe. (I
used it going into my filtering barrels, but you could use it for the
pipe going back to your main pond. Stir up the water in the bottom of
main pond, and the filter "sock" should filter out more of the clay.
Good luck!
--
Kathy B, zookeeper
3500gal pond, 13 pond pigs
Oregon