I am using First Bites and something new (for me) that is working out very well: Ocean Nutrition Instant Baby Brine Shrimp. You have to refrigerate the jar once its opened. I have been giving my baby Angel fry the brine shrimps three times per day with two feedings of the Hikari First Bites. I cannot see anything bad from this feeding schedule--still LOTS of fry swimming around! It was kind of expensive--but I didn't have time to hatch my own and decided to try this stuff out. I gotta say--I really like it!
Bubbles I tried the ONBBS recently too. I also marked the lid with the date I opened it since it's supposed to only be good for 6 weeks after opening. Just be careful with it. At 4 and 1/2 weeks when I opened it, it just smelled a little off to me. I chucked it rather than take a chance. I think for me once I open a jar it's going to be impossible to come anywhere close to using a jar up in 6 weeks time, a little goes a long way. But great stuff!