what is it exactly?!

is to good for goldies?

I heard they were But I just can't find any LIVE daphnia in any LPS in NY usually un-process or live food lessens the chance of SBDs and they're more cool!

Daphnia is a very nutritious food for your goldies, and you can get them frozen in most pet stores. A few online stores sell them as starter culture live, and you have to take care of those to stay alive. Pretty simple really, and much healthier than so many processed foods.