At home, they often feed on fallen leaves, bark, aquatic plants and snails. Because of its slow movement, it rarely catches fish in the big environment. Occasionally touching the bodies of fish and shrimp is naturally delicious in their mouths. Therefore, crayfish are perishable. But it doesn't mean they like to eat rotten things, which is also necessary. Because they need to constantly absorb biological protein and calcium.
In the aquarium, the crayfish's food is naturally adjusted by the owner himself. This makes the foraging process of crayfish less difficult. Let's talk about my views on feed.
First, live food: red worms, breadworms, shrimps and fish. I've seen people feed these crayfish.
First of all, I never like feeding live animals, because wild animals carry germs, even parasites and eggs. Some people will disinfect with salt water before feeding, but this is not a safe practice.
It is worth noting that breadworms are juicy (this metaphor seems a bit disgusting). After being bitten by crayfish, the mucus in the worm will spread into the water, which is very bad for the water quality.
Moreover, red worms and bread worms lack chitin and calcium, which is of little significance to crayfish nutrition.
Shrimp is reliable, rich in calcium and chitin, and rich in biological protein. Now I want to focus on it.
Dry selling of barreled river shrimp is a good choice. First, soak the shrimp in hot water and stir it. Ten minutes later, it began to sink to the bottom. Those that don't sink should be squeezed underwater, and the bubbles will sink when they are squeezed out. Then you can feed it.
There are also some experienced players who have fed some seafood and shellfish, and now it looks good. But it is not recommended for most people. After all, it's hard to control.
Vegetables are also very attractive to crayfish. Someone is feeding carrot sticks and someone is feeding spinach. As long as there is less juice, it is more reasonable.
But no matter what you feed, remember one thing in the end: don't leave the rest of the food in the bottom sand for too long. Otherwise, it is easy to produce several harmful bacteria and erode the shell of crayfish. Commonly known as shell disease. When bacteria invade internal tissues, it will cause the death of crayfish. The initial symptoms are black spots on the carapace. This will be elaborated later.
Usually, after feeding for one hour, it is better to pump out the food residue with a hose. This must be strictly controlled.
In fact, feeding these foods has its disadvantages. The first is that there are many food residues, and the second is that it has a certain degree of impact on water quality. The third is some trouble. My own experience is that feeding shrimp food is the best choice.
Shrimp particles are small and have little residue. And it has little impact on water quality. No trouble.
But the shrimp food on the market is basically fishy, and crayfish seem to like it, but it has no nutrition.
Many hands-on friends have started to make their own shrimp food. Crush the shrimp and add chopped vegetables and some vitamin products. You can add more good things to it at all costs. This depends on your collocation ability and imagination.
However, homemade shrimp food is troublesome to operate and expensive, which is a patent for enthusiasts.
To sum up, the common cause of death of crayfish is shelling failure, and there are probably the following reasons for shelling failure.
First: being attacked by other creatures during shelling.
Second: unreasonable food, lack of calcium, chitin and biological protein. Or often hungry. Although the crayfish is hungry, it will definitely not be shown to you when it comes to shelling. Even if shelling is successful, soft shell disease is easy to form after shelling. This disease will be introduced in detail below.
Thirdly, the hardness and PH value of water are not up to standard, which was introduced in the previous chapter.
Fourth: when crayfish show signs of shelling, don't pay attention to it deliberately. Many people can't help but be curious, turn on the light from time to time, or open a hole to see it. Facts have proved that this kind of interference will delay the shelling of crayfish, and even lead to the failure of shelling seriously.
Fifth: crayfish are too old to live.
If all the above problems were noticed, there would be no shelling failure. At least I haven't encountered such a situation.