Sinking vs. Floating Koi Food

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Sinking vs. Floating Koi Food

September 05, 2014 - 08:53

This article is by Rosimeri Tran, one of our CKK Scholarship Students in 2014.  Congrats Rosimeri, and THANKS! for such a great article!

Benefits of Sinking Koi Food

1. Koi that normally stay at bottom will eat more.

2. Balanced feeding when fed both floating and sinking together

3. Less damage to koi during feeding frenzy

4. Excess air is not taken air unlike surface eating, therefore less likely to have swim bladder disease


Benefits of Floating Koi Food

1. You get to see your koi and inspect for any problems when they eat at top surface.

2. Costs less than sinking

3. More varieties available

4. Food not consumed is visible and can be easily scooped up, vs sink-ing not consumed can clog up bot-tom drain or stay at bottom uneaten causing water quality problems.

Both floating and sinking koi food are produced in the same way, they blend the ingredients in a batter, which is then cut to size and cooked under pressure. Vitamins and nutrients are added and moisture or steam is added at a rate of 15-20% at a temperature range of 150-170 degrees Fahrenheit. Now the dough is ready for extrusion, hmmm what is extru-sion you ask let me explain:

The food enters into a machine that looks like a rotating drum, the koi food dough here will be kneaded and as it is pushed through a propeller shaft it will be subjected to heat and pressure at the same time. As the dough keeps moving through more heat and pressure are added. Feed density is determined by the amount of pressure applied during expulsion, this density will determine if the feed will be floating or sinking. Now the feed is forced through a die which will cut the koi feed into smaller pieces as it leaves the machine the sudden drop will cause it to expand to 4 times its size.

Now the feed will go through a dryer so as to remove the moisture so as no spoilage will occur, this is also where any oils and fats will be introduced into feed. It will be dried again to allow the oils to sink into feed then once the feed dries completely it will be ready for packing into bags.

Always when purchasing koi food look for an expiration/production date on the bag, al-though buying in bulk sounds economical, if your koi won’t eat it before that date expires you are not feeding nutritious food to the koi. Koi food should be stored in a cool dry en-vironment and not left in the hot sun as it will destroy the nutrition of the food and can cause it to become rancid, any koi food that smells like paint thinner is no good and should be thrown out.


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