CATDOLL : CATDOLL: How to deal with moss in crab pond? ? ?

1. How to deal with moss in crab pond? ? ?

I have visited quite a few ponds recently and found moss. If this happens, try not to use special pesticides to prevent damage to the planted aquatic plants. The best way to deal with it is to cut off the photosynthesis of the moss (that is, to prevent it from seeing the sun). Another measure is to properly fertilize the water to reduce the transparency of the water. After some time, use a suitable disinfectant (not to harm the crabs, and to kill algae at the same time) to disinfect and degrade the algal toxins produced by the death of algae (moss is a general term for filamentous green algae). If you have any questions, those in Jiangsu can call:; QQ: 66366176

2. How to remove moss in crab ponds?

Stocking silver carp, a fish that feeds exclusively on moss, can eliminate the

The water turns blue due to the abundance of organic matter, and there are too many mosses and algae.

If not handled in time, it is easy to cause water oxygen accumulation at night when the air pressure is low.

Silver carp cannot reproduce on their own, so the OP does not need to worry about it in the future.

The problem of the supplementary culture in the pond exceeds the main culture! In addition, increasing the water flow into the pond is also a

A very good way to cooperate.

3. How to remove moss in crab pond?

If there is moss in the crab breeding pond, you can use 80-100ppm of gypsum powder and evenly spray it throughout the pond three times, with an interval of 3-4 days between each time.

Based on your description, we are unable to determine the cause of the crab's death. We hope the following content will be helpful to you.

The weather is hot in summer and the water temperature is high. In order to ensure the safety of river crabs in the summer, improve the survival rate and promote the rapid growth of river crabs, pond crab management is particularly important.

(1) Strengthen water quality management

In the hot summer season, the surface water temperature of the crab pond can sometimes reach 30℃, which is not conducive to the growth of river crabs. The water temperature of 22-25℃ is suitable for the growth of river crabs. If the water temperature is too high, the water quality will deteriorate easily, resulting in insufficient dissolved oxygen in the water body. River crabs will leave the water body and climb to the slope of the pond. The food intake will decrease significantly, affecting growth. In summer, the pond water should be deepened to about 1.5 meters to reduce the water temperature. Change the water once every 5-7 days. When the water temperature is above 33℃, change the water once every 2-3 days. Each time, change 1/3 of the pond water, drain part of the pond water first, and then add new water. The water source should be clean, non-polluting and non-toxic. The best time to change the water is in the evening, and it is not advisable to change the water at noon to prevent hot water from burning the crab body. Apply quicklime regularly (the dosage is 15 kg/667m2) to maintain a pH value of 7.5-8.5.

(2) Transplanting aquatic plants

In summer, some floating plants such as water hyacinth, water lily, and water peanut should be transplanted into the crab pond, and they should be blocked with ropes or bamboo poles. The water plants can provide shade and cooling, and provide a cool habitat for river crabs. In addition, Hydrilla verticillata and Vallisneria serrata should be planted in the crab pond so that river crabs can eat and avoid enemies. The coverage of water plants accounts for 1/3 of the pond surface. Rotten water plants should be removed immediately to avoid deteriorating water quality and breeding bacteria.

(3) Pay attention to feeding

River crabs are omnivorous animals with a wide range of diets. They particularly like animal bait (such as small fish, shrimps, snails and clams, etc.). However, a high proportion of animal bait will increase the breeding cost and easily deteriorate the water quality. Therefore, in summer, it is appropriate to add plant bait (wheat, potatoes, yams, pumpkins, etc.) to the fixed feeding table. The feeding time is after 17:00 in the afternoon and before 6:00 in the morning. The feeding amount is about 50% of the total body weight.

(4) Do a good job in the four preventions

Patrol the pond every morning and evening to prevent escape, theft, disease, and predators. Pay special attention to the heavy rain in summer. Prevent rain from washing away the pond bank and causing the crabs to escape. Strictly prevent the harm of harmful biological organisms, such as rats and water snakes, usually by human expulsion, tool capture, and drug poisoning. The density of crabs in the pond is high, and there are many diseases, so prevention should be the main focus. If you find signs of disease such as crabs not eating, inactivity, limb rot, and dirt on the body surface, quickly apply drugs to treat them to reduce the death of crabs and ensure the rapid growth of crabs.

4. How to remove moss from crab pond

Go to a fish pharmacy and buy a special algae remover. It works quickly! Frequent water changes can reduce the chance of moss growing in the pond.