I recently bought 2 Dojo Loach to go in my Goldfish tank. After a couple of weeks i noticed tiny white spots all over my Goldfish. They weren't swimming very well so i isolated them and had a big clean. It seemed to clear up but then one got sick and died after a few days. Now one of the Loach has developed a large ring around its body and it can't swim properly.
Any ideas
Any ideas