I personally am a fan of feeding frozen. The brand of frozen that is most readily to me is San Francisco Bay Sally. I think we maybe have one other brand available but it has some unnecessary ingredients in my opinion. So usually I feed the Freshwater Multi-pack. It has the Emerald Entree, Blood-worm, Spirulina Brine-shrimp, and Freshwater Frenzy. For a period of time I fed the Emerald Entree and supplemented Blood-worms. During that period of time is when I first noticed the growth of BG Algae. I notice sometimes when looking at the blister pack after poppin out the Emerald Entree their is like a blue-green residue in the cube? Do you think is just coincidence? Just curious.. Also what kind of food do you prefer to feed and the benefits? Lately I've been supplementing with some dry manufactured food, but until now cant really remember a time where i fed flake.