Honestly I think aquarists ethics are too high these days. Look at all the negative hype around balloon fish. Any knowledgeable/logical fishkeeper will tell you to avoid at all costs.
I do think goldfish are in the clear only because they've been around for so darned long. xD
Argh... So I figured out why it isn't working... the redirect link keeps trying to capitalize the G in goldfish in the url. No clue why it wants to do that. This is the only site where it happens... If you just click on the link in my signature that will take you to the article, too.
Ya. Goldfish do get a pass because that's just the way people assume they are. But I do hope that bettas don't get as crazy as some goldfish breeds are.
Those could look nice. I have one of those bubbles walls for my 55 gallon as it gets about 80F in the summer. The one thing I would recommend is to poke holes with a needle at even intervals to make the bubbles come out in a nice "wall." Before I did that they were just kinda sporadic and one place liked to make the most annoying hissing noise.
Since there are something like 30 pages in the thread already I didn't go back and look to see if I've posted this before. But I think it's a great video with some beautiful fish. These are two adult orandas in a 29 gallon tank. This was made by a user on the goldfish forum I frequent.