Mazuri Koi Platinum Nuggets, An Extruded, Floating, Complete Diet Designed For Koi & Large Goldfish Greater Than 6 Inches Long In Ponds, Tanks And Aquariums, 4 lbs(1.8kg) Complete Nutrition - No supplement needed. Proper Dietary Protein To Energy Ratio In Mazuri Koi Diets Helps Prevent Excessive Fat Deposition In The Liver, Which Can Decrease The Health And Market Quality Of The Fish. Multiple Sources Of Pigmentation- A Blend Of Carotenoids Include B-Carotene, Spirulina, Canthaxanthin, Astaxanthin, Tagetes(Aztec Marigold) Are In This Formulation. The Blend Can Be Bennificial Because Fish Sometimes Metabolize Carotenoids Before Depositing Them To Natural Receptors In The Skin, In A Species Dependent Way. Extruded Pellets Have The Best Digestibility Of The 3 Pellet Manufacturing Techniques(Extruded, Expanded, Compressed), The Best Feed Conversion Rates, And Use Carbohydrates(starch) As Binders So "Nutritionally Blank" Ingredients Are Not Used To Bind The Pellet. Better Feed Conversions And Reduction In Total Biological Load In The Water Column Is The Result. Extruded Floating Nugget - 5/32" x 3/16" This Includes 4 Pounds Of Feed Packaged In A FDA Food Grade 1 Gallon High-Density Polyethylene(HDPE) Bucket.