Be careful when feeding your Koi. Even if you buy the best Koi fish, as many of you ruin water feeding your koi pond and make your disease! Koi with ammonia from the foods we eat. In fact, some people even refer to them as ammonia machines. The reason is because the amount of food they eat. Being voracious eaters, they consume almost everything in its path! – Ammonia is secreted in several ways: – The digestive process (which includes both the feces and urine) – Breathing (introduction of ammonia through their gills) – Uneaten food (which is broken down into several chemicals that containing ammonia) – the pond bottom sediments (faeces, including dead leaves, vegetable matter in your pond and dead organisms) Despite having the best Koi fish to try to maintain healthy fish can feed you, if not shut your pond water to control and maintain the Koi pond is very clean you have sick fish. Water quality is the most important factor in Koi illness.There ways of calculating the amount of ammonia generated by the Koi food. Not be accurate, but gives a good estimate. It is based on the weight of food fed daily and the percentage of protein in the food.By multiplying the weight of the food by the percentage of protein in the diet and the percentage of nitrogen in protein (typically 16%) to find the atomic weight if you water.Then nitrogen in the volume (and weight) of water in the pond you know Nitrogen.Nitrogen hours creating ammonia and ammonia nitrite.Each day in a typical pool of 1.9 ppm to 5 , 2 ppm of ammonia and nitrite produced. If the amount of ammonia and nitrite effectively measure (by testing your pond water), the difference is the amount of "consumed" by the bacteria daily.If no bacteria are present in the pond for ammonia and nitrite digest , and do water changes, the concentration of ammonia increased by 1.9 ppm per day and up to 5.2 ppm for nitrite day.If this is your Koi will die quickly due to the toxicity of ammonia and nitrite. After only a week or two of life in the water with 20 ppm ammonia or nitrite, most of your Koi will die and someone must still live Columnaris and Aeromonas infections and worse.So ensure that the level of beneficial bacteria in the pond and test your pond water regularly. If water quality is not up to snuff no matter if you are the best Koi fish are food!