1. What are the available size fractions of GEMMA Micro?GEMMA Micro 75 (50-100 microns) GEMMA Micro 150 (100-200 microns) GEMMA Micro 300 (200-500 microns)
2. What is the nutrient profile of GEMMA Micro?Protein 59%; Lipids 14%; Fiber 0.2%; Ash 14%; Vitamin A 23000 IU/kg; Vitamin D3 2800 IU/kg; Vitamin C 1000mg/kg; Vitamin E 750mg/kg. For more specific nutritional information please contact your Skretting representative.
3. At what age can I begin feeding GEMMA Micro 75, and how frequently do I feed it to the larvae?GEMMA Micro 75 can be used as a start feed for newly hatched zebrafish larvae. Feeding can begin on 5 days post-fertilization. Tanks with newly hatched larvae should be fed GEMMA Micro 75 ad libitum a minimum of three times daily.
4. At what age can I begin feeding GEMMA Micro 150, and how frequently do I feed it to juveniles?Transition to GEMMA Micro 150 can be done around 15 days post-fertilization. Feed ad libitum three times daily until transition to GEMMA Micro 300.

5. At what age can I begin feeding GEMMA Micro 300, and how frequently do I feed it to sub- adult and adult spawning fish?Transition to GEMMA Micro 300 can be done around 30 days post-fertilization. Feeding can be done twice daily for sub-adult fish, and once daily for adult spawning fish. GEMMA Micro 300 is sufficient size to feed to adult fish.
6. What feeding rate should I use GEMMA Micro 300 when feeding to adult fish?Feeding rate can start at 5% body weight during sub-adult stage, and decrease to 3% during adult spawning phase
7. Do I need to use paramecium or rotifers when feeding GEMMA Micro 75/150?It is not necessary to feed live feed when GEMMA Micro is provided to zebrafish at all lifestages according to recommendation. For laboratories that prefer to use rotifers as a first feed to zebrafish, GEMMA Micro 75 can be used as a co-feeding diet with eventual removal of rotifers at the transition to GEMMA Micro 150.
8. Do I need to use Artemia when feeding GEMMA Micro 300?
   It is not necessary to feed Artemia to zebrafish. Feeding GEMMA Micro 300 once daily has been proven to replace Artemia and provide as good or better results in spawning performance, fecundity, and egg quality.
9. What studies have been done to validate GEMMA Micro as a complete diet for all life stages of zebrafish?Lawrence, Best, James and Maloney. The effects of feeding frequency on growth and reproduction in zebrafish (Danio rerio). Aquaculture 368-369 (2012) 103-108.

   The Successful Elimination of Live Food from a High Throughput Zebrafish Facility. Carrie Barton, Sinnhuber Aquatic Research Laboratory, Oregon State University, USA. In preparation. (Presented at Aquaculture America 2015).

10. What is the effect of GEMMA Micro on full life cycle survival?When compared to control groups fed Artemia + dry diets, GEMMA Micro program resulted in higher survival when measured at 30dpf and 90dpf (Barton 2015).
11. What is the effect of GEMMA Micro on spawning success and fecundity when used as an Artemia replacement for adult fish?When compared to control groups fed Artemia + dry diets, treatments fed solely GEMMA Micro 300 resulted in higher breeding success, more embryos produced per spawn, and significantly greater lifetime embryo production.

12. Can GEMMA Micro help me to simplify processes in my lab and reduce costs?Absolutely! GEMMA Micro can not only save on the direct cost of consumables (Artemia cysts and algae), but also on all the associated labor in maintaining these processes in the laboratory. No longer does the capacity of the live feed preparation room dictate the usable area for housing fish.
13. Where is GEMMA Micro manufactured and according to what regulations/guidelines? What is the sanitary condition at the factory?GEMMA Micro is manufactured at Skretting France located on 24 Le Pont de Pierre in the town of Fontaine Les Vervins, FRANCE.

    Skretting France is certified by ISO 9001:2008, Global GAP, and AFNOR. Feed production at Skretting France adheres strictly to EU Regulations on Feed Production, and is licensed by French Ministry of Agriculture and Veterinarian Services.

    The feed line for GEMMA Micro is managed under strict sanitary guidelines. For example, after each batch production or maximum of 15 hours of operation, there is a phase mandatory cleaning and disinfection of the production line.

    All raw materials for GEMMA Micro production are kept in plastic bags or filmed big bags on pallets, separated by automatic closing system, and floor cleaned daily.

14. What is the shelf life of GEMMA Micro? How long can I use it once the bag is opened? Can I freeze GEMMA Micro to extend the shelf life on opened bags? How about vacuum sealing smaller aliquots?GEMMA Micro is immediately packaged under nitrogen to remove oxygen from bags. Furthermore, specialized packaging for GEMMA Micro prevents entry of oxygen on sealed bags. As a result of this packaging and confirmed nutritional analysis of hold-back samples, GEMMA Micro has guaranteed composition for 2 year from production on un- opened bags.

    Once the bag is opened, product should be used within 30 days under normal storage (refrigeration). Vacuum sealing can extend shelf life, but caution should be taken not to compress diet too tightly as to alter the physical properties. GEMMA Micro can be put into freezer to extend shelf life close to expire date. Caution should be taken not to freeze with moisture in the bag, or during defrost when moisture can form from condensation.

15. Can I “wet” feed GEMMA Micro, or does it need to be fed dry?GEMMA Micro can be fed to tanks in water using a squirt bottle. Duration of “wet” feeding should be kept short. For example, feeding only one rack side at a time, and then

reload bottle. Do not shake bottle. Mix by inverting bottle several times before feeding tank. Do not store GEMMA Micro in water.

16. Can I use GEMMA Micro in hand feed dispensers, or automatic feeding systems?

GEMMA Micro has excellent free flowing physical characteristics. The feed will remain free from clumping while in a properly closed container. This aspect is innovated into the diet which makes it exceptional for hand feeders, programmable feeders, feeding robots, and belt feeders.

17. What is the smallest size packaging for GEMMA Micro?

GEMMA Micro 75, 150 and 300 are available in 0.5kg bag units.

18. How do I order GEMMA Micro?

Get in touch with our team

Email: info@mbki.com

Tel: +44 (0)115 9656699