When you use plain, unscented kitty litter...
rinse it really, really, really well. Lots of rinsing.

I used black, rigid mesh pots so the rinsing was easy, the water just flowed
out the sides.
I topped the litter with larger stones. This kept the fish from picking it up
and spitting it out all over the pond.

The advantage of kitty litter is that it is easy to push in fertilizer tabs and
it stays nice and loose when it comes time to divide the plants.

hth!

kathy :-)
A HREF="http://www.onceuponapond.com/"Once upon a pond/A