1, delicious.
Good feed has a natural smell of fish and shrimp, while poor quality feed has a lot of flour, which smells like greasy spices and has a salty feeling, a bit like adding monosodium glutamate or chicken essence. As for the kind that smells sour or stale, it is the worst.
2, not muddy water.
Good feed can keep its original shape in water for a long time and will not fall apart and dissolve. Poor quality feed will soon turn into paste if put in water, and even water will turn into the color of feed. Too bad! Of course, this "long time" is
Opinions vary. There is a saying on the internet that one day, but I personally disagree. Because the feed does not dissolve in water for a day, isn't it almost the same in the goldfish's stomach? How hard is it to digest? So it won't dissolve for long.
This feed may cause enteritis. Personally, I think the feed can be kept undisturbed in water for 2-4 hours. In fact, the feeding time of goldfish should be within 3- 15 minutes. enclose herewith
By the way, many places that sell small goldfish are the kind of red and green granular bulk feed with a bag of fifty cents, which is red, green and green, super rotten, muddy and discolored. Don't buy it!
3, not greasy.
Good feed is put into water, and the water is still clear, just like there is no feed. The inferior feed itself lacks "material", so in order to lure goldfish to eat, oil is used to enhance fragrance. The surface of that kind of feed looks shiny, and when it enters the water, it is an oil film, which is simply terrible ... Maybe you are still using waste oil. ...
4, the volume is slightly smaller.
The online saying is that the feed should be matched with fish, the big fish should feed the big feed, and the small fish should feed the small feed. But I personally think that the feed should be one size smaller than the fish, that is, the big fish feeds medium grains, the medium fish feeds small grains, and the small fish feeds ultra-small grains ... Why?
However, the smaller the feed, the easier it is to digest and reduce the chance of enteritis. But if it is too small, it will take longer to eat. The fish has been trying to eat for a long time, but there is nothing in its stomach, which is not good, so the smaller one is better.
5. It does not swell when it meets water.
After a good feed is put into water, after a period of time, the volume is almost the same as when it is dry. And inferior feed, water absorption and expansion is very severe. Everyone knows that goldfish are actually full, but some goldfish are still dead.
In fact, it is no problem to eat inferior feed, but the feed absorbs water and expands quickly in the goldfish's stomach, and finally the fish dies, or even if it doesn't die, it may be indigestion or even enteritis.
6. Soft.
Although the shape of a good feed will not be turbid for a long time after entering the water, it will actually become mushy when it is gently pressed with the belly of your fingers. It can be seen that it is as easy to decompose and digest as porridge, which is suitable for the delicate and fragile stomach of goldfish.
Oh, goldfish have no stomach, but because of this, goldfish's intestines are more prone to failure, so we should take good care of them. And the poor quality feed is as hard as stone, and it can't be pinched with nails. How hard do you think it is to digest?
I don't like that kind of feed for wild fish, let alone goldfish. ...
7. The content of protein is above 30%.
In addition to the "wild vegetable" feed specially for goldfish, goldfish feed as a staple food must have enough protein to make the fish grow a beautiful and domineering figure, and if you want to create a magnificent head tumor for goldfish, then,
Protein content exceeds 40%, even close to 50%. However, we should pay attention to the fact that there must be so many real protein contents, not false standards, otherwise melamine is used to confuse the protein detector ... but the protein in feed was studied.
How big it is, we ordinary people can't see it, so, probably, it can only be passed on by word of mouth ... In addition, I personally think that the protein of goldfish that doesn't need to be started is too high and meaningless, but it increases the burden on the stomach and doesn't need to be exceeded.
40% will do.
8. Good hydrophilicity.
Good feed should be high in protein and low in fat, that is, low in oil. Moreover, low oil content makes it hydrophilic, which means it is easy to combine with water, so that the feed can be easily digested and absorbed. And some sinking feed of general quality, throw it.
Into the water, there are many small bubbles hanging on it, which is not good. Personally, I have a test method, which is to drop a drop of water on the glass plate and gently push a feed against the drop. If water is added to the feed immediately
Take a breath, that's a good hydrophilic feed. If feed and water drops tend to stay out of the way, they are a little too oily, or the quality of additives such as adhesives is not very good.
9. Add beneficial ingredients.
Spirulina is generally goldfish's favorite food, equivalent to vegetables, easy to digest, and has the effect of making goldfish more colorful. There are probiotics, similar to Bifidobacterium in yogurt, and probiotics are added to goldfish feed.
Bacteria help goldfish digest and regulate the stomach. Another good additive is allicin, which has a good effect on enteritis, and the key is that it has no toxic side effects … and so on. Of course, just like protein content,
We don't have microscope eyes, so we really can't see if those things have been added. So, this is an estimate ... first, it depends on the description of ingredients, and second, it depends on word of mouth. ...
10, fish love to eat.
After all, feed is used to feed fish. Even if you are as good as a flower, it's no use not eating fish. Therefore, the premise and foundation of good feed is to make fish like it very much and want to eat it after eating it! After all, good feed can only play its full beneficial role if it is eaten by fish.