Who Gives A Fish Forums

If your betta's being a bit too active for a still shot, I've found the 'live photo' feature to be a lifesaver. You can pick the best frame from the sequence and edit it into a great still image. I use a Windows device, but I'm pretty sure the iPLione has a similar feature - might be worth checking ...

I've come across micro pellets from Hikari that might be worth a shot. Zoo Med and Pices also have their own versions, you could give those a try. Another option is goldfish treats - I know they're messy, but they break up into tiny pieces that are soft and stick to the tank. You'd need some snails ...