Both the ingredients and the sinking feeds are the same. However, the technology used to make floating feed is extrusion. This technology is very similar to popcorn technology.
Floating fish feed must be extruded so that the feed has a gap and air to float. This is more difficult than home-made floating fish feed extruder machines.
You can add baking powder to the grains. I don't know if this is good for fish growth, but you could try it if you are interested.
www.fishfeedmanufacturing.com
