Dear Jayaraj, There are a number of feed ingredients which are important, all selected based on the nutrition of the fish being fed. For floating starch is needed at about 20% to insure floating. Feed ingredients need to be ground to a minimum of 1/3 the die hole size. I would think the finer the better for small fish down to about 200 micron. Dear Halim, You are correct, attractants can be beneficial to the first feeding. If the fish are started out when young they will eat the feed more readily throughout their growth cycle.
There are several factor that affect the proper Extrusion and Floating quality- 1. Extrusion Temperature - It vary from 120 degree centigrade to 145 degree centigrade 2. Extrusion Time - vary with extrusion temperature ( 1 to 4 minutes) 3. Particle size of the ingredient - if the particle size is more small effective extrusion within short time. 4. Starch percentage - at least 20% for better floating (100%) 5. Raw Material Quality- Practically we have seen that low fiber content raw material, high floating tendency.
Dear All, Thanks for all the info provided. Currently we are researching in developing floating and slow sinking feeds for ornamental fishes. Regards jayaraj
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