Awesome....neat little fish aren't they.....just wait until they settle in and start playing and if you have both sexes they will spawn-you may not get live fry but they will go through the motions...pretty interesting......
As far as food, you have it covered-I also would get some algae wafer food that contain Spirulina-I like the OSI brand but they are all pretty good-the trick is them eating it and not the Betta...lol...you just play it by ear...I fed my otos daily at a rate of 1-wafer per 4 otos along with the blanched spinach leaves 3-4 times a week-put the wafer in at night and if any is left the next AM with lights on I would remove it-this will help keep the Betta from eating too much of it...