There are two ways to use powdered fry food. One is put it in water first, stir it and pour it in the tank. Apparently this is good for fry which are not surface feeders. I was told by Mike Reed that betta fry can eat from the surface, so I just dip a dry finger tip in the bag of food and shake it over the water. I shut of the sponge filter at that time and let the fry eat from the surface for a while. Then I turn on the air, and the 100-200 micron pieces are moving around suspended in the water, so the fry also eat within the water column. The food eventually sinks, where the fry can pick at it on the bottom along with the pygmy corys. I have seen the betta fry eat the fry food at all three levels. Maybe the water movement helps, but betta fry do eat things that are not wiggling around.
I have tried Hikari First Bites, and it is a good product. But the current fry food is like 10 times more stronger in smell, and the fry are devouring this stuff with less hesitation than the Hikari product. I think Reed's product has a stronger scent to attract the fry. Also after doing some calculations the price between Hikari First Bites and Mike Reed's food is about the same. First Bites cost $3.95 for 0.35 ounce.
Mike Reed is also a former editor of Tropical Fish Hobby Magazine.
I know that my current use of powdered fry food and miniature corys will save me a lot of time and money. I now need to see how big the fry get with this system, so I'll be posting a new photo every week.