bloated

Hey, my flowerhorn has been extremely boated and hasn't pooped in over a week. The other fish in there has white stringy poop so I thought he had parasites and maybe transfered it to my flowerhorn. I tried a salt soak and nothing happened. My flowerhorn is swimming and eating fine, just no poop...

My flowerhorn still eats normally and swims normally as well. His belly just looks huge to me and I'm worried because he's my baby! Raised him from a fry. I did an epsom salt bath today for 10 minutes (that was about 4 hours ago) but nothing changed yet. He has a 75 gallon tank by himself (the...