I think I might be losing my oscars everything was fine yesterday and I noticed Hydra all over the tank , so I added some wormer like I have heard people do , and a few hours later everybody looked sick ,, I did a 50% water change right away ... and waited , well this AM they still look pitiful , so I took an old ten gallon , and put water from each of my other tanks to fill it up and create a new quarentine tank , they are in there now , (2 oscars and a striped cat) just laying there ,.. is there anything else I can do to help them ???