These fish have great personalities! They also breed easily. Some floating plants help them when they build their bubble nest. I also had alot of babies come from putting them in the pond for the summer. There is also an albino version.
Some of my favorite fish - often misnamed (I believe it is a mistake_ as a paradise Gourami. I have had some that I would classify as Semi-Agressive and others that were very peaceful. A healthy aquarium will allow their red stripes to really show, otherwise expect just blueish color.
Very beautiful fish. I had several when I was younger and they were one of my favorites. Mine however were not in any way peaceful with other species of fish. I ended up with quite a few fish with one or no eyes because they loved to snack on their tank mates eye balls.
I own a single paradise fish, named chance, at the moment. (He is soon to be moved to a 30 gallon with another paradise fish seperated from him with a tank divider). Chance is definitely not the prettiest paradise fish in existence (that's what I get for buying him from petco), but he is still a handsome fish with a bright red tail, blue dorsal with white spots, and blue-edged anal fin with red and yellow rays. He seems to be fairly similar to a betta in behavior but is faster and slightly more spastic in his movements. Still quite the graceful fish though, and quite hardy. As he is the only fish in his tank I can give no comments on compatibility.
On a side note, paradise fish can withstand temperatures MUCH lower than 20 Celcius - it's actually usually advised online to keep Macropodus opercularis at temperatures between 15 and 23 degrees celcius, meaning they are excellent candidates for unheated aquaria.