Gloria, Thank you for those long replys. I am sure you are a very nice person and you mean very well. However you completely missed the point of my experience by a mile.
It doesn't matter if the ulcer diagnosis, the fish health diagnosis, the pond store water testing or any number of peoples advice is right or wrong. It doesn't matter what the quality of my pond was or what the condition of my fish were.
First lets just say you have a 5,000 gal pond. Lets say you want to safely add tap water in a slow trickle of about 100 gal/hr. Lets say you let it run for 7 hours while your are at work or overnight while sleeping. Do you then add enough dechlor for 700 gal or 5,000 gal? Do you add the Dechlor before you start the trickle or after?
You see the hard lesson that I learned here is it doesn't matter. The water must be dechlorinated before the fish are exposed to it. If the dechlor is working while the fish are swimming in it. They are getting poisoned. Even if you have years of experience with this method you were only getting lucky. Eventually you will hit a hot spike maybe or this city is sterlizing the neighborhood or anyone of unknown scenarios could have happened.
The only reason my fish are dying is because they were exposed to chlorinated water. I have gone through all the errors in my thinking, errors in my and others diagnosis, errors in my judgement, errors in my testing or other peoples, errors in the treatment of my water and errors in the treatment of medicating of the fish. But in the end the fish are dead and I am experiencing a huge loss because the water was not dechlorinated and healthy BEFORE the fish were exposed to it.