"When I first got into Leo's I was told to use this. Really ReptoCal alone is fine though I still keep a bowl of this stuff and ReptoCal in my tanks. RC is accepted more. The only problem I've had with this product is that last time I ordered 2 bottles online the experation dates were fine but the powder was spoiled because it didn't have a fresh keeper in it. (Green and really gross smelling. :S) As for what I powder food in, I choose ReptoCal."