This is a very interesting post as my problem and solutions are narrowing very quickly and something like what is being discussed here maybe my only option. Shawn can you tell me what product name you used that seem to have good success?
Using Rid-x a product for a septic tank would concern me although I understand it is the same concept.

I have been considering this product:
http://www.effens.com/products.php

Almost forgot here is the link to my problem
http://www.pondboss.com/forums/ubbthread...0083#Post128214