Using “Bio-Floc “ as a supplemental feed source Our recent research into using “bio-floc “ as a means to produce fish has been remarkable! The technology is not new but has gained significant interest recently as the demand (cost) of protein in feed has increased. Brief explanation of the technology – Biofloc is an aggregate of bacteria, protozoa, algae, and all sorts of other material typically found in nutrient rich water, it is very rich in protein. A key feature of biofloc, is that the protein in biofloc is very digestible to Tilapia, it is “packaged” in a form that is easy for the fish to eat and it is extremely nutritious. The results of our first experiments with using the biofloc method were impressive. During a period of 6 weeks our test tank containing 80.1 lbs. of fish produced >30 additional pounds of fish flesh using only 7 lbs. of commercial feed! The only input other than the paltry amount of commercial feed was several cups of cane sugar – the biofloc provided the bulk of nutrition the fish needed. Toxic pollutant levels remained at or below safe levels, no water was added during the time period. Rearing fish using biofloc technology is counter intuitive for a variety of reasons. Biofloc communities thrive on the pollutants (primarily nitrogen) that we typically strive to remove. IF these microorganisms are provided with sufficient carbon (in the form of sugar or cheap carbohydrates) they convert these pollutants into high quality protein! There are some complexities in rearing fish using biofloc, some power is needed to keep the water mixed and there is some finesse in maintaining basic water chemistry. We are focusing our efforts to formulate simple training materials and energy efficient “mixing” methods. Production trials are ongoing and we hope to engage the help of our expert microbial colleagues to help us maximize the protein producing effectiveness of the bacteria.