In a one gallon bowl, you should actually be doing more than one water change per week...
And never use soap to clean anything of a fish! Soap is toxic, even if you rinse out well there is still a risk...
Just using hot water and vinegar works well for cleaning.
Also, breeding bettas is a lot of hard work that requires a lot of dedication and studying! You can't simply throw a female and male in a bowl-it's a very difficult proccess. So I suggest you read a lot before you do consider it.
Last edited by Jupiter; 09-24-2010 at 11:14 AM.