It seems opinions are split on this. It's very interresting to hear both sides of the story. I suppose in the end it boils down to personal choice. As long as regular maintence is kept up the betta should be fine.
I will stick to no less than 15 litres but for those who have smaller tanks at least they know that experienced people have had no problems keeping them in these tanks and have had healthy happy long lived Bettas.
Out of interest as it's been bugging me as I'm cycling my betta tank. If you don't have a filter obviously you don't have to cycle so can I add my betta now? What happens amonia and nitrite wise in a small unfiltered tank. This is a serious question not a dig or anything lol. I wanna know because I have reserved a betta and amting for the tank to cycle. If I add him would he be ok?
I think one persons "cruel" is another persons good by what's been said so far. I really am not anywhere near knowledgeable enough on betta's to be an expert, maybe not even a novice. I'd always though that bigger the tank, the happier the fish. Maybe this isn't the case with betta's but as I said, I'm not an expert.
Totally agreed I am animal mad so am a bit of a crusader lol. But experienced people have shown another side to the story which is good.
You asked, I shall answer. When I keep bettas in bowls, I utilize sprigs of the Pothos plant (Epipremnum aureum). As long as the leaves are not submerged, stems of the plant can be submerged in water indefinitely. I've had sprigs submerged for years. Ammonia is uitilized by plants very quickly. Because the plant's leaves are above the surface, it can process a great deal of carbon dioxide, you have a plant with a higher metabolism for removing waste from the water. The sprigs grow roots and the environment becomes very clean actually. My male betta just got through a month of me being on holiday with only top-offs because he had pothos sprigs and free-floating moss in his bowl. A huge plant mass to accomodate any ammonia build up. He's doing great.
By the way, saw you edited the poll. I can't win this one, can I? Oh, just make it yes or no... It's so much nicer. See, I even answered your question, despite you thinking me cruel...
Liz