My betta tank is a 1.75 gallon "pet keeper" (like a kritter keeper). I know that is far below the minimum most people think is necessary for bettas. However, it is filtered (mechanical, chemical, and biological), cycled (ammonia, nitrites, and nitrites are all 0, I've been checking them every other night), and heated. It also has 5 small live anubias, 1 small live java fern, 1 small silk plant, and a ceramic hollow log for a hide out. My fishie is a female betta about 1.75 inches long and I think she is still growing. Is this a suitable home for her or should I bite the bullet and spend the $80 for a 5 gallon tank and a bigger heater and filter to go with it?