Thanks so much for re-posting this for me-- I did it and am happy to
report that it works great for me. So far, I have only used the 2 TBs.
once. ( in the upper stream out from the veggie filter.)
I soaked the litter with pond water, to a mushy consistancy in a paper
cup first.
The two shorter streams and the bottom falls, are now free of the stuff.
I am VERY grateful for this tip !
Bette, in Central OH