fishnovice
Fish Herder
Just rescued small goldfish kept in the worst conditions possible -1.5 years in tiny 1inch diameter max bowl with NO FILTER. Even after a water change today (embarrassed owner said) the bowl was so filthy with dark brown murky water I literally couldn't even see the fish!Water was foul,with bits of decaying plants, lots of poo and smelt like raw sewage. Put fish in plastic container to take home (1 hour bus journey) and diluted bowl water with 33% tap as I didn't think water had enough oxygen in it to last 1 hour. Fish currently floating in plastic container with lid on in bucket of week old water from my routine tank change. Fish not moving but if still alive, should I tip it into bucket of relatively clean clear water? Remember reading on this forum about Old Tank Syndrome and that fish kept in filthy tanks for years can die if suddenly put in clean water. Don't have any dirty water apart from that bucket,what should I do - tip in filthy water+fish from plastic container into bucket? Also will have to isolate fish if it survives the night as I don't want to infect my own healthy fish but don;t have spare quarantine tank (could use bucket?)What obvious signs of disease should I check for?