As you can see from the photos my fish have been having some issues recently.
White one has had some red streaks in tail now has this fluid filled sack on fin. He is 8.5 years old and has been relatively healthy until a year or so ago.
Orange fish is 4.5 years old and yesterday developed a white patch on her head. Up until then looked fine. Are in very established tank, tested water and all fine ammonia and nitrite at 0, nitrate 0-20 ppm
Currently in a 100L tank (I know it's small,
have been trying to save money for a larger tank for a while but other priorities have overtaken) with no substrate and only one rock for decoration so haven't come from injury. Currently treating with Melafix.