I have been doing twice weekly 50% change of water for the past 2 months due to increase no. of tank mates.
Guess that is not enough!
The rest are ok and eating well though. Only problem with this GH is it is not eating for the past 2 weeks as I had stopped feeding live food. It is the only aro which is stubbornly refusing to take MP/blood worm/beef heart/pork/chicken.
Just hoping the dropsy don't spread.