Remeber Franky, you still have to find out why the fish came down with this.
Fluctuating temperature?
New fish addition to tank?
High Nitrates, ammonia, and/or Nitrites??
Remeber, always quarenteen new fish, and if possable sick one. I setup a Hospital, quarinteen tank after I learned my leason the hard way. I got sick of treating my 55gallons and 30 gallons tanks. Now a put new additions in the 10g for 2 weeks.