Would love some advice please.
I have a tank which is 160 litres, cold water, has a filter, live plants and is home to two lovely goldfish (although I'm still a little confused about specifically what type). The tank sits just below the windowsill (ie. not windowsill height) in a bedroom.
I have had the tank for approxiately 8 weeks, although the fish much longer - they were originally in an outdoor pond.
Recently one of my dearest fish died and I suspect he died of TB after doing lots of research re each symptom as they presented. The symptons in order were pop-eye, swimming upside down, dropsy, slack broken looking tail, blood spots or ulcers on body and finally seizures - this occurred over a long period (12-weeks if not longer) and I spent lots of time researching and treating each symptom.
I removed all 3 fish from from the pond when I noticed his pop-eye, placing the 2 fish in good health into the new tank and isolated the sick fish until his eye healed, he stopped swimming upside down and his general health appeared OK. After placing him in the tank with my two other fish, I had to remove him 2-weeks later because of dropsy, and it was downhill with the remaining symptoms from there.
I undertake weekly water changes of 25% and added some tonic salt to the tank last week as I noticed that one of the fish was zoomin down towards the gravel to itch its side. I didn't want to do anything more drastic as I can't see any visible parasites, ie. no white spot and no visible hooks or worms.
Are these all related???
Am loving my fish since bringing them inside, originally they didn't seem to like the tank but now when I sit and watch they come over and pace back and forth to say hello!
Incidentially I also noticed that there is an green algae like appearance growing on the glass in my tank - have posted a question in the cold water forum and am receiving lots of responses to that.
Any advice would be most appreciated.