What's wrong with my gourami

[Incisions072185]

He's been acting strange lately, like not being active and not really wanting to eat and just hanging by the bottom of the tank. The last 2 days he's been developing a strange bulge on his right side and now he's floating at the top and slowly leaning to his left side. If I could post a video I would but I'll try and post screen shots

 

[Incisions072185]

 

[Incisions072185]

He's struggling.

 

[Brookster123]

Tell us everything about your tank and this fish.. More details the better

 

[Incisions072185]

I have a 37 gal community. Current stock besides this one is 9 Cory cats, 5 red minor tetras, 1 blue gourami and 3 snails. The past few weeks he's been acting like this, I check the parameters on the 6th and came up with: ph 7.4 ammonia 0 nitrite 0ppm and nitrate 40ppm. I've been keeping keeping up with regular water changes. I've had this guy for a little over a year and he's the oldest one in my tank. I've recently added 6 Cory cats to the tank to up the total to 9. Other then that I rehomed a common Pleco and a pictus catfish that were in the tank less then a week ago.

 

[Incisions072185]

Right now he's still breathing but laying on his side on the bottom. He just used some energy to get to the top when I was putting water back in the tank but then floated back to the bottom

 

[Brookster123]

Nitrates are a tad high but I doubt that's the reason if he's been in there for over a year, I've heard gouramis often have health issues, maybe it's just the end if his run? I had a guppy go out in a similar fashion. I netted him and left him propped at the top if the tank netted to see if he would eat or swim..

 

[Incisions072185]

Maybe it is just his time, the mysterious bump is what weird to me. Maybe I'll try netting him to see what he does

 

[Incisions072185]

He's still breathing but has been like this for a few days now. Should I just wait it out?

 

[Incisions072185]

Any ideas anyone? He's still breathing and just laying on the bottom