I have tried everything and have spent a bundle doing so. My fish have been with us for 4 yrs and have never had any problems. Ph a few weeks ago hardly even registered! Fish store said its suprising any of them lived. One of the fish has a curved spine now and can only swim in circles at the bottom of the tank. Moved him to a different tank with another that seems doped up at times. He just swims around for awhile then stands on his head like hes parilized. The remaining Goldfish (3) are in a 30 gal tank with a double whisper filter system. They have lost some of their scales...am using aquarium salt. One has cotton mouth which I have tried treating 3 different times to no avail. The second is now starting to get it. I used fungus clear. Have also used meds for parisites. Ph is ok now but took a couple weeks to get it where it needed to be. Don't know why it took such a nose dive. We have town water and I think that they may have added something. Even called them! They said no. All other levels nitrates, alkaline, ammonia seem fine. I am so frustrated. My husband thinks i'm nuts because I'm so upset and attached to these fish. It is 3 generations of fish. When they were outside they kept breeding. I'd bring them in for the winter. A year ago something was eating them. Now they're indoor fish. Please help, I don't know what else to do. Each day they get worse. The largest is about 6 inches long. Fish are fed pellets once a day. I add stress coat when doing water changes (30%) Changes done every 7 to 12 days. Three fish in 30 gal tank, one 6 inch, other 2 about 4 inches. 10 gal tank has 2 whites discribed above both about 4 inches and one small one only about 2 inches that seems ok so far.

Hi venmae and welcome. What a very distressing thing. I am so sorry you are losing your fish. When you say zero pH do you mean zero on the pH scale - how did you test that? And can you check your tank and tap water for ammonia, we need the exact readings. Your cycle must have crashed and if so one water change every 7-12 days will not be nearly enough.

When we use meds for fish they have to be used in goldfish- perfect water which means zero ammonia and nitrites and low nitrates and stable pH ...and without these pre- conditions the meds will just make the fish even sicker Please post back soon with those water readings and do a large temp, pH matched and treated water change in both tanks immediately.

How are your fish now, Venmae?