It was by chance that I tried out some new goldfish pellets which I just bought for my expecting ranchu, the New Life Spectrum 1mm goldfish pellets. Not only were the NLS pellets about half the size (probably a bit more than that even) of Aqueons but they were actually a better size for the small mouth of my betta. Shockingly, Meko LOVES them (his gills even flare open at times and he quickly gobbles them up, two at a time if he can)... although he refuses to eat the ones that sink to the bottom, fair enough. He even prefers the NLS pellets over the Aqueon bloodworms, he just goes crazy for the NLS pellets, it's awesome to see (I kind of feel bad for my past betta's seeing how happy Meko is with this new food). I had never seen a betta fish eat so much, so now I'm buying Meko the NLS for betta's (the cheapest I found for this food was on eBay for $8.99), and while this may be a bit pricey for betta food it will last a very long time as betta fish do not eat that much (eh, normally).
*I will try to update this post later down the road when my NLS betta food arrives and let you know what Meko thinks of that. In the mean time here's a good video I found on the NLS food.