To be completely honest since I joined this forum it seems not just seeing it be said to me but also to others about their tank size. When that has had nothing to do with the question. I may be a little defensive on this but, I see a lot of tat on here, I saw one poor kid on here get told over and over she was basically not a good Betta owner because of tank size and that poor little one was a child. I can see if someone has it living in a cup and being very poorly with cleaning and such to be critical but some I have seen can be harsh. Not you guys in this thread, I know your offering me up good advice you have and knowledge, it is just crazy how some put people down on here for tank size.
I think what happens is that people just get really upset at stuff like that.
Especially considering some people on here are VERY experienced betta owners, and there are a few vets. Therefore, more than likely, they know what is going on. They don't want to see others lose their precious betta because the tank was too small and ammonia climbed up and killed the fish. :(
I also think a lot of people become...rude, I guess would be the way to put it, to more experienced people. This may because they "think" they know the right things to do things because it worked "this way" as a child, or they know someone who had things work "this way" for someone else. Sometimes, as much as you dn't want to hear it, it might be nice to just think about what is being said. :)
It's like going to a forum, telling people you live your great dane in a 10x10 yard, and then asking about buying another one. People ARE going to tell you that that is NOt sufficient room for the dog, and that they should reconsider. In that case, said person may go "oh, you're right", or they can go "I don't care. Answer my question."
It's kinda the same way here, I belive :)
But keep in mind, people want what's best for you and your betta ^^
EDIT: I need to go, but I do apologize if I did go off topic sometime earlier! D8
I wish you lots of luck!!! :D