My betta lotus has dropsy 
A few weeks ago, he lost a little chunk from his lip, but he could still eat OK and seemed fine, so I changed the water and kept an eye on it. It got no worse, but no better either.
Then I fed him yesterday and noticed he was a bit bloated, so I was intending to give him a pea today, but he's started to pinecone
Just checked ammonia and it's 0ppm. He gets pellets, granules, bloodworm and peas, so varied diet. I have the worst fishy luck.
A few weeks ago, he lost a little chunk from his lip, but he could still eat OK and seemed fine, so I changed the water and kept an eye on it. It got no worse, but no better either.
Then I fed him yesterday and noticed he was a bit bloated, so I was intending to give him a pea today, but he's started to pinecone