Ideas for how to treat?
As you wait for more advice, I would do a partial WC. Fresh water does wonders.
I have been daily. prime in the morning then 75% at night. Nitrites spike is my cause for sure. Salt I heard is bad so I'm in limbo on what to do.
I'd look into Dwarf Gourami Iridovirus (DGIV). It's very common among Colisa lalia, and one of the symptoms is abdomial swelling. It can also be triggered by poor water quality, as supported by your statement about the nitrite spike. Here's a link that describes DGIV: http://www.fishchannel.com/fish-health/disease-prevention/fish-viral-disease.aspx Unfortunately, the disease is completely untreatable and fatal. Hopefully, your DG doesn't have DGIV and is afflicted with something far less serious. Keep up the water changes, like AmazonPassion suggested. Have you noticed any other symptoms, like white, stringy poop or difficulty with swimming?
he swims to eat and swims around very little he got a pea yesterday
His waste looked normal I just notice. Epsom salt bath for 2o mins?
so I need to treat my whole tank now?
No. It only affects dwarf gouramis.
So should i Melafix and Pimafix him? View attachment 1466387946599.jpg swims around for air looks like. Hangs out there and at the bottom. Waste looked dark string. My girl said she notice stringy
Definitely do not use either product with your DG. The extract used in the meds is deadly to anabantoids because it sticks to the inside of their labyrinth organ, thereby suffocating them. Best thing to do now is to keep your water as clean as possible. Hopefully your fish doesn't have DGIV and instead just had an internal parasite of some sort. Consider looking into Hikari Prazipro or API General Cure.
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