Hello guys!I hope you are doing wellI have a really serious issue with my goldfish. I recently purchased these fish from someone who was having a pond clear out and decided to buy some of his goldfish for my 400L aquarium. After 1 day, I could see that the fish were not behaving normally. Some were just sitting at the bottom, others would gasp for air at the surface and some would also crazily swim back and forth. I tried treating them with PIMAFIX, but I found that it mad oxygenation levels worse in the tank and they were gasping for air even more. So I did a 100% water change to remove the medication. I tried white spot treatment (blue in colour) with my filter on and 1 day later I can see fin rot and the spotty, gritty, sand-like texture of their fins and eyes.Guys can you please advise what I need to do, I am super stressed here
