A small group of 8 rasbora in a 5 gallon QT tank. All are active and eating but for one. The ill rasbora has clamp fins, doesn't swim much, tends to stay in one area. On one side of his body, has some white growth but the other side does not. Currently he is the only one ill and i am dosing kordon rid ich plus. How to get rid of the disease before it spreads to the other rasbora? Also after I am done using this tank as a QT, it will become a shrimp tank.