I have been recently comparing different veggie flakes, and have come to stay with the first ones I bought. Nutrafin Spirulina Algae Flakes. I have compared them to several other flake brands, and these are the largest I've seen. I use them in my larger cichlid tank, and they rarely lose any flakes. They seem to really like these flakes too!
I compared them to some different brands of algae tablets, wafers, and discs. I was pleased to find that the ingredients appeared to be better on my brand! It also comes in a convenient container with a screw-on lid....which keeps 'em fresh.
So, for comparison's on size, nutrition, and overall looks.....Nutrafin Max Spirulina Algae Flakes work well for me! I would suggest getting the smaller container sizes. Yes, you will spend more money over time, but it doesn't have time to lose it's freshness (and nutritional value), and the flakes don't grind themselves to powder as much as when they are in a huge container and sit longer. I go for either the smallest, or second smallest size every time I purchase fish foods. Freshness DOES matter!