Havnt seen him pooh or eat at all. Should I get him out of the tank? Can he infect other fish? his scales look ok. Not like he's about to explode or anything. Tho there is a tiny white thing slightly sticking out of his bottom. He also tends to stay near the top but can swim down if he likes
The "white thing sticking out of his bottom" is the stringy poop I was describing. If you decide to treat him for bloat it would be best to get him out of the tank and into a hospital tank - the treatment can be pretty harsh. (Note: I've copied some info I had on file regarding bloat treatment - I think I read it here.) In my experience the prognosis is not very good even with this treatment. On the plus side, bloat is not contagious, but the conditions that led to the problem should be considered (e.g., poor water quality, diet, aggression, are all possible contributing factors) and amended if possible. Sometimes it just happens in a tank that otherwise is healthy. Not sure why.
Medication required: Clout (Aquarium Products) or any medication containing Trichlorphon as the main ingredient. If you cannot find something with this drug, then a cure with Metronidazol is recommended (ie: Jungle’s Internal Parasite Guard or Jungle Parasite Clear Tablets.) Metronidazol is also known under one of it’s brand names Flagyl. Clout (Triclorphon) is the most widely used cure for bloat though.
Day 1: Move fish to quarantine tank and treat with Clout at full strength (1 tablet / 10 gallons--remove carbon from filter)
Day 2: No water change. Treat again with Clout at half strength.
Day 3: Do nothing
Day 4: Do an 80% water change and treat with Clout at full strength
Day 5: Do nothing
Day 6: Return fish to main tank only after symptoms have subsided and the fish has been healthy: (eating, swimming, breathing normally) for a week.
RESIST the urge to try feeding the fish until after the treatment is over and do not cut the treatment short regardless of whether the fish looks better or not. If at any time during the treatment your fish seems to be experiencing stress as a result of the medication then do an immediate 75% water change.