Purina Mills Aquamax Pond Fish 2000, 32% Protein, 5/16"(7.9mm) Floating Pellet For Catfish, Tilapia, Large Koi and Goldfish, Carp, And Many Other Omnivorous Fish That Normally Populate Ponds, 13 lbs A High Performance, Plant Protein Based Diet To Promote Maximum Growth In Moderate To High Density Tank And Pond Production Farming Of Tilapia & Other Omnivorous Fish. At 32% Protein And 3% Fat, Problems Are Avoided Such As Excessive Fat Deposition In The Liver, Which Can Decrease The Health And Market Quality Of The Fish. A Low Nitrogen to Phosphorous Ratio Reduces Water Pollution. Extruded Pellets Have The Best Digestibility Of The 3 Pellet Manufacturing Techniques(Extruded, Expanded, Compressed/Steam), The Best Feed Conversion Rates, And Use Carbohydrates As Binders So "Nutritionally Blank" Ingredients Are Not Required To Bind The Pellet. Better Feed Conversions And Reduction In Total Biological Load In The Water Column Is The Result. For Tilapia Weighing 50 Grams(1.75oz) To Harvest Size, For Catfish 4 Inches To 14.4 Inches &gt; For Koi Greater Than 12 Inches. The General Rule For Choosing A Feed Size Is To Deliver The Largest Size That The Smallest Fish Will Eat. The Proper Feed Size Can Also Be Selected By Comparison Of Feed Size To Mouth Gape Size, Gill-Raker Spacing, And Esophagus Width. Includes 13 Pounds Of Feed Packaged In A FDA Food Grade 3.5 Gallon High-Density Polyethylene(HDPE) Bucket, A Measurex 236.58cc (8 oz/1 cup) Measuring Scoop, And A Lid Opener.