CATDOLL : CATDOLL: Can clams be raised in tap water? How many days does it take to raise them?

Can clams be raised in tap water? How many days does it take to raise them?

answer

Clams generally refer to clams, which mainly live in the ocean. Therefore, they cannot be raised with tap water. Seawater should be used, and a layer of sand should be laid underneath. If there is no seawater, salt can be added to the water to simulate seawater, and it can be raised for several days (30-34g of salt per 1kg of water). The breeding cycle of clams is relatively short, and they usually grow to about 10-16 months, and are captured when they grow to 30mm or larger.

1. Can clams be raised in tap water?

1. The clams people usually refer to are usually flower clams.

2. Clams mainly live in the ocean, so they cannot be kept alive with tap water. Seawater should be used, and a layer of sand should be placed underneath. If there is no seawater, salt can be added to the water to simulate seawater. Generally, 30-34g of salt is added to every 1kg of water, and the concentration of the salt water is controlled between 3-3.4% (usually it can be kept for several days).

3. The feeding method of clams is passive filter feeding. The main food includes unicellular algae such as sieve algae, boat algae, chlorella, and nitzschia, as well as invertebrate eggs, bivalve D-shaped larvae, copepods, nauplii and a large amount of organic debris.

4. Clams can survive normally in seawater with a dissolved oxygen content of 1 mg/L, but when the dissolved oxygen content is continuously lower than 0.5 mg/L for more than 10 days, the clams will die.

2. How many days does it take to cultivate clams?

1. The cultivation cycle of clams is relatively short, generally about 10-16 months, and clams are harvested when they grow to 30mm or larger (in China). If it is in European waters and North America, it is generally 16-30 months, and clams are harvested when they grow to 30-40mm or larger.

2. Clams grow fastest when they are 1-2 years old, and their growth rate becomes slower after 3 years old.

3. Influence of temperature: Clams have a wide range of temperature adaptability and can adapt to water temperatures of 0-36°C. They grow normally in water temperatures of 5-35°C. They grow fastest in water temperatures of 18-30°C. When the water temperature is 44°C, the mortality rate is around 50%; when the water temperature is 45°C, almost all of them die; when the water temperature drops to 0°C, they stop eating; when the water temperature is minus 2-3°C, the mortality rate is around 10%.

How to raise koi?

The price of koi ranges from 3-5 yuan for a small domestic koi to hundreds of thousands of yuan for a Japanese koi. The average lifespan of a koi is more than 70 years.

Speaking of raising koi, it is actually not difficult to raise koi, but it is not easy to raise them well.

In my experience of raising koi, more than ten fish died in the first two months. It was with the firm belief of never giving up that I stepped out of the misunderstanding of following the usual way of raising goldfish. Now looking back, I also found that my original way of raising goldfish was also wrong. The following content is based on the idea of ​​raising koi first, and I was inspired. I hope it can be helpful to everyone.

In fact, koi are not difficult to raise. As the old saying goes, people who don't know how to raise fish can also keep koi alive for one to two years. But it doesn't mean that they can be raised in a rough manner. It should be emphasized that koi consume a lot of oxygen. If they are raised in an aquarium or other small containers, the stocking density is high, and an inflator is a necessary equipment. Koi have a lot of excrement, so they should be raised in a bare tank, and a water filter device is also necessary. Koi swim fast and like to jump. Decorations that may cause harm to koi and the fish tank should not be placed in the fish tank, and the container should be covered. The minimum requirement for choosing a fish tank is also 80 cm long (this tank can only hold 2-4 koi of 20-25 cm in size). It would be best if you can use a larger container, of course, because you have to consider the issue of whether the koi should stay after they grow up. But if you don't even have an 80 cm tank now, it doesn't matter. First, successfully raise the fish, and then make plans.

To raise Koi well, the key is to choose the fish. Buying small fish of 10-20 cm will have the highest success rate of keeping them alive. When choosing fish, you should see if the water is too muddy and if there are a few rotten fish in the fish school. If this is the case, you don't need to look at the fish in the pond. If you pass this test, you can quietly watch the fish you want. Do not buy fish with short and big heads, flat and blunt mouths, skinny or bloated bodies. Choose fish with a symmetrical body, active swimming posture and bright eyes. Cheap fish usually don't have good colors, as the saying goes; you get what you pay for, but the body condition is still good. After choosing the fish, remember to ask the store to add oxygen to your fish. After bringing the fish home, don't rush to open the bag. Put the whole bag of fish on the surface of the water for 45 minutes to 1 hour to let the fish slowly adapt to the water temperature, then open the bag and let the water gradually mix with the water in the bag before releasing the fish.

In the next few days, the water is most likely to become turbid. It is best to change 1/2-2/3 of the water every day. If your fish tank is too large and it is difficult to change such a large amount of water, you can use a suitable small container to temporarily keep the fish for two weeks. When you see that the fish's condition begins to improve, then scoop the fish into the permanent container. Remember to balance the water temperature of the two containers before scooping the fish. Whether it is temporary or permanent, it is best to put enough activated carbon in the water filter, which is to minimize the amount of harmful substances. After the fish are stable, if you use a small container such as an aquarium to keep koi, depending on the water quality, it is best to change 1/8-1/3 of the water every 4 or 5 days. This is very beneficial to the healthy growth of koi and keeping the water clean.

In the whole process of raising koi, it is generally not necessary to add preventive drugs. Blindly applying drugs will only kill the fish. When individual sick fish are found, they should be isolated in time, observed for a few days, and then given the right medicine. When giving medicine, the activated carbon should be taken out. The medicine should be light rather than strong. Pay attention to observation. Once the fish have any discomfort, change the water in time. Commonly used drugs include: Royal Fish Treasure Universal Medicine (the main ingredient is methyl blue), yellow powder, potassium permanganate (adjust the bath water to pink).

Koi should be fed two to three times a day, and the amount of food should be such that they can finish the food within ten minutes each time. It is recommended that you buy bulk spices (a mixed granular feed, brown with a fishy smell).