Fish farming is a business, the purpose is to make money! In this case, fish farming, like other businesses, must take input and output as the evaluation index to make money. After buying fry, the biggest input is feed, and the output is the amount of fish. In other words, farmers spend money to buy feed, then turn the feed into fish, and finally sell fish to make money. In this process, the feed price determines the amount of input, and how much fish you buy into the feed determines the output. These two aspects determine how much money you make.

Many people only see the first half, that is, how much they spend on feed every day, which is easy to figure out. However, few people have calculated the number of Jin of fish produced by the feed. Therefore, some farmers only know how much money to invest every day, but they don't know how much value the money invested every day can bring them, that is, how many kilograms of fish they grow. Under this premise, these farmers think that the higher the feed price, the more money they invest every day, so the higher the cost will be.

The premise of this calculation method is that the weight of feed long fish is different at different prices. Is this really the case? Wrong! We all know that you get what you pay for, and the feed with high price will definitely be better. The concrete manifestation of this "good" is the different meat exchange rate, which is what we often call the feed-meat ratio. We compare the growth performance and value of different feeds with good feed and ordinary low-priced feed as examples.

Good feed 340 yuan/bag, the feed-meat ratio is 0.8-0.9, that is, 8-9 two feeds can grow 1 Jin fish, and according to the calculation of 0.9, 1 bag can grow 45 Jin fish. Low-priced 240 yuan/bag, the feed/meat ratio is above 1.3, that is, if it exceeds 1 kg 3, it can grow 1 kg fish. According to 1.3, 1 package can grow 30 kg fish. According to the current price of 40 yuan/kg of pearl gentian, 1 pack seven good ingredients, invest 340, long fish 45 kg, earn 1800 yuan, use 1 pack low-priced ingredients, invest 240, long fish 30 kg, and earn 1200 yuan.

Just looking at the investment, it costs 100 yuan less with low-priced materials, which really saves the cost of 100 yuan, but it has lost 15 Jin of fish and earned 600 yuan less. If you use 5 tons of feed (250 packs) a year, you will think that you have saved 2.5 yuan's feed money, but you have lost150,000. If you really raise fish to make money, what would you choose? In other words, as long as you are willing to invest 25,000 yuan more each year, you can earn150,000 more. Do you want to do this business or not?