Hi, I am relatively new to fish, and have aquired 5 zebra fish from a school that no longer wants them.....I have had them for a few months now with no issues, but two weeks ago one of them got Sick (I think). He (just guessing) has dropped to the bottom of the tank and just goes round and round in circles. To be blunt he looks like it is having some sort of seizure, then lays still for a while and starts again, never getting more than a 1-2cm off the bottom and always on his left side. It looks like it has a bloated tummy, the fish shop said it sounded like Swim Bloat???? with no cure. I googled and did what they suggested - put him in a separate tank, I tried the Pea Trick with no success so moved onto Epsom Salt baths, he looks a little better but is still at the bottom of the tank.....any suggestions of what to do next? The others are all perfectly fine, as is the water quality and food. HELP ME PLEASE!