Yeah, I have a hard time getting decent pictures of them because I have a really nice camera XD! I know that sounds ridiculous, but the more expensive/professional the camera is, the harder it is to take pictures sometimes. I need like lots of light, a steady hand, and a steadier subject (lets face it, fish are hard to photograph).
I have a flash, but I prefer natural lighting so I have a flash scoop, which I should really try with my fish. However, I don't have one of those fancy professional flashes that freeze everything without washing everything out and making it look crappy.
Alduin's tank gets good light and Ro gets a small window of good light during the day, but poor Paarth is in the corner on the same wall the window is, so he doesn't get as much. I can take the bettas out and photograph them in their cups if I want, but I haven't tried with Ro yet because she's not feeling well and I don't want to stress her out. I need some good pictures of her though when she's better.