I found this game that is all about tropical fish. I'm on level 10 I think and I have all ready unlocked tetras, gouramis, mollies, guppies, cichlids, and another but i cant remember. I cant wait to get up to the betta level! I know they have bettas because they are on the main menu. There are 4 diff. types of food so far lol, flakes, BS, BW, and pellets. Plants, and meds come along as you level up. You can breed, sell, buy, and meet the needs of the levels until you finish. It is so fun I'm addicted lol. The fish even get dropsy if you don't change the water enough, and oh! the annoying ever present algae! lol. There is a lot more to the game I haven't gotten to yet, oh! you can make a tank using the items you have unlocked and put it as a screensaver, can you say betta betta betta dream tank screensaver?!?! lol
Its on this link. You have to download it though. Available in mac and pc versions. However, there is some kind of bug where whenever you x out of the window after you downloaded it, it resets the timer while still saving the game. Anyway, this way you get unlimited play time. Check it out! It follows everything that I have learned on this forum.