RayVega, sorry to hear of the problems with it! We use a product on all our rock garden ponds called "TLC". It's a live bacteria that helps clarify the water, keep down smell, maintain proper nitrate levels and so forth. Since it is not a chemical, you can not overdose the fish. We've used this for over 8 years now and still have nice and healthy Koi and goldfish (seperate pond).
If you can't find it and are really interested, drop me an e-mail and I'll see if I can find a TLC dealer in your area for you. One of my offline ventures happens to be a pond shop
