Originally Posted by Xeek
Why do you think that? Bettas are kept in far less space often, though I find that cruel. The length may not add to the amount of pollution the water can handle but it does add to the swimming space for the fish if at least on a horizontal plane which I find better than a 2.5G tall tank that some people use for these fish. There is plenty of space for them to swim compared to what these fish grew up in.
They're not all that dirty, and AqAdvisor.com (which I am told is conservative on its calculations) considers the tank only 75% to capacity when stocked with 3 male bettas.
Could you add more reason to why 3 bettas can't live in a tank like this? I am already prepared to add a 2nd filter to the other side of the tank as the dividers will severely restrict the water flow. I will have a heater, but it's not a major concern of mine in a warm climate and the inside of my house is never below 74. I have an unheated crayfish tank that stays at 78F in the bedroom (computer equipment keeps the room warm). Anyways there will still be a heater - power could go out on a cold night
Just because the norm is to keep Bettas and Goldfish in horrendous, inhumane conditions, it doesn't make it ok. I'm not saying that your set up is cruel, but I stand firm in my belief that 2 gals is not enough space for a Betta to thrive. Here's what our website's profile has to say about it, " 5 gallons is agreeable to many as a safe minimum size. Lesser than that is often considered cruel, as this restricts space for them to flaunt their fins as they usually do in the wild."
AqAdvisor is in no way the authority on fish stocking. Yes, it can be helpful in planning tanks, but like any computer, it cannot fully account for the complexity of real life. It is prone to mistakes. It is a good start, but it doesn't come close to the advice and knowledge of experienced fish keepers. I've been in the hobby for only 2 years or so, so I'm definitely not an expert.
It's important to recognize that just because a fish CAN live in a situation, it doesn't mean that it will be happy or thrive. If you're set on having multiple Betta, I would highly advise on splitting the tank into two, rather than three. I feel very strongly that 5 gallons is the minimum for Bettas, but if you're going to split the tank I feel that 3.25gal each is much better than 2gals.
I apologize if I come across as rude or standoffish. I'm just very sensitive and upset about the treatment of Bettas and Goldfish.