This started about a week ago my BD looks like he vagues out and starts floating with his nose up. At first it was not very often but it is getting more and more. He also is a bit darker than normal and sometimes holds one fin against his body. Appart from this he still eats well. They were wormed last time about ten days ago and I did see worms. I have added salt to the water and got the temp on 32 but no luck so far. This could be a swim bladder problem but another of the BD was doing it too, he has stopped now. Yesterday I added another canister filter to their tank as it is only 5 foot with 16 3inch discus in it. I have made sure the water is flowing into the side of the tank. However I think with me mucking around with the tank yesterday he is stressed which hasnt helped the suitation.