About 6 days ago I realised some of my fish look really bloated. I googled it and narrowed it down to dropsy. According to most websites it is because of stress, over crowding or poor water conditions... I have a 25 gal with 5 red eye tetras 2 emperor tetras and 1 dwarf gournami... so I really don't think it is over crowding. My nitrates is nearly 0 my ph is 7.5 and I do a 40% water change weekly, and have live plants. I don't know why they would stress, they are in a quiet place with no traffic and they have lots of hiding places... I've had the red eyes for a while now and one emperor also... I got one more emperor and the dward about 9 days ago... I keep my water temp at 26¤ C. I feed them twice a day flakes and blood worms. I really don't know what is causing this!!! I treat them with 3 teaspoons of salt every day and bacterial medicine I got from the pet store... I would appreciate your help!